CINXE.COM
Browse by Subject | NIH Library
<!DOCTYPE html> <html lang="en" dir="ltr"> <head> <meta charset="utf-8" /> <script async src="/sites/default/files/google_analytics/gtag.js?sne11y"></script> <script>window.dataLayer = window.dataLayer || [];function gtag(){dataLayer.push(arguments)};gtag("js", new Date());gtag("set", "developer_id.dMDhkMT", true);gtag("config", "UA-26862354-2", {"groups":"default","cookieFlags":"\u0027max-age=7200;secure;samesite=none\u0027","cookie_flags":"max-age=7200;secure;samesite=none\u0027","forceSSL":true,"anonymize_ip":true,"page_placeholder":"PLACEHOLDER_page_path","link_attribution":true,"allow_ad_personalization_signals":false});gtag("config", "G-DDQQBGV0L0", {"groups":"default","cookieFlags":"\u0027max-age=7200;secure;samesite=none\u0027","cookie_flags":"max-age=7200;secure;samesite=none\u0027","forceSSL":true,"page_placeholder":"PLACEHOLDER_page_location","link_attribution":true,"allow_ad_personalization_signals":false});gtag("config", "G-LJBXMJ7FB9", {"groups":"default","cookieFlags":"\u0027max-age=7200;secure;samesite=none\u0027","cookie_flags":"max-age=7200;secure;samesite=none\u0027","forceSSL":true,"page_placeholder":"PLACEHOLDER_page_location","link_attribution":true,"allow_ad_personalization_signals":false});</script> <meta name="Generator" content="Drupal 10 (https://www.drupal.org)" /> <meta name="MobileOptimized" content="width" /> <meta name="HandheldFriendly" content="true" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <link rel="icon" href="/themes/custom/nih_library/favicon.ico" type="image/vnd.microsoft.icon" /> <title>Browse by Subject | NIH Library</title> <link rel="stylesheet" media="all" href="/sites/default/files/css/css_4IlYPyFTV1k84Ph-Qfm0486ZwJLpcjKe_Oj_hZIOUk0.css?delta=0&language=en&theme=nih_library&include=eJxVjW0KwzAMQy8UkiMVpzGNqZtlVtyP24-NjrE_Aj3EEy4M3lImcGhSJ5VsZFcigAcCn0OlramYd9J417ALH0ifjNujuHLoZLQY9Yrv-Eeit-5ZBZXL38vTZV6ntxIvjBY2Kg" /> <link rel="stylesheet" media="all" href="/sites/default/files/css/css_VxEv4uz8L2bys7qM5a7yUZ5FyIJ3YHman7pKey20BMM.css?delta=1&language=en&theme=nih_library&include=eJxVjW0KwzAMQy8UkiMVpzGNqZtlVtyP24-NjrE_Aj3EEy4M3lImcGhSJ5VsZFcigAcCn0OlramYd9J417ALH0ifjNujuHLoZLQY9Yrv-Eeit-5ZBZXL38vTZV6ntxIvjBY2Kg" /> <link rel="stylesheet" media="print" href="/sites/default/files/css/css_DcLwrpabm3542jIl5az6f073pHl3NPSgduPKL72W8rA.css?delta=2&language=en&theme=nih_library&include=eJxVjW0KwzAMQy8UkiMVpzGNqZtlVtyP24-NjrE_Aj3EEy4M3lImcGhSJ5VsZFcigAcCn0OlramYd9J417ALH0ifjNujuHLoZLQY9Yrv-Eeit-5ZBZXL38vTZV6ntxIvjBY2Kg" /> <link rel="stylesheet" media="all" href="/sites/default/files/css/css_joUKMLxMBqy36kZSfSZEgkMPnnayZdj7X3CpkKEwsUE.css?delta=3&language=en&theme=nih_library&include=eJxVjW0KwzAMQy8UkiMVpzGNqZtlVtyP24-NjrE_Aj3EEy4M3lImcGhSJ5VsZFcigAcCn0OlramYd9J417ALH0ifjNujuHLoZLQY9Yrv-Eeit-5ZBZXL38vTZV6ntxIvjBY2Kg" /> </head> <body class="path-resources"> <div id="skip-link" role="navigation" aria-label="skip to main content"> <a href="#main-content" class="usa-sr-only focusable"> Skip to main content </a> </div> <div class="dialog-off-canvas-main-canvas" data-off-canvas-main-canvas> <section class="usa-banner"> <div class="usa-banner"> <div class="usa-accordion"> <header class="usa-banner__header"> <div class="usa-banner__inner"> <div class="grid-col-auto"> <img class="usa-banner__header-flag" src="/themes/custom/nih_library/assets/img/us_flag_small.png" alt="U.S. flag"> </div> <div class="grid-col-fill tablet:grid-col-auto"> <p class="usa-banner__header-text">An official website of the United States government</p> <p class="usa-banner__header-action" aria-hidden="true">Here's how you know</p> </div> <button class="usa-accordion__button usa-banner__button" aria-expanded="false" aria-controls="gov-banner"> <span class="usa-banner__button-text">Here's how you know</span> </button> </div> </header> <div class="usa-banner__content usa-accordion__content" id="gov-banner" hidden=""> <div class="grid-row grid-gap-lg"> <div class="usa-banner__guidance tablet:grid-col-6"> <img class="usa-banner__icon usa-media-block__img" src="/themes/custom/nih_library/assets/img/icon-dot-gov.svg" alt="Dot gov"> <div class="usa-media-block__body"> <p> <strong>The .gov means it’s official.</strong> <br> Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site. </p> </div> </div> <div class="usa-banner__guidance tablet:grid-col-6"> <img class="usa-banner__icon usa-media-block__img" src="/themes/custom/nih_library/assets/img/icon-https.svg" alt="Https"> <div class="usa-media-block__body"> <p> <strong>The site is secure.</strong> <br> The <strong>https://</strong> ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely. </p> </div> </div> </div> </div> </div> </div> </section> <div class="usa-overlay"></div> <header class="usa-header usa-header--extended usa-header--extended-megamenu" id="header"> <div class="usa-banner-inner"> </div> <div class="region region-header usa-navbar padding-x-4" role="banner"> <div class="usa-logo site-logo" id="logo"> <em class="usa-logo__text"> <a class="logo-img" href="https://www.ors.od.nih.gov/" accesskey="1" title="Home" aria-label="Home"> <img src="/themes/custom/nih_library/logo.svg" alt="Home" /> </a> </em> </div> <div class="region-header__aside"> <div class="callout"> <div class="callout__content"> <div class="callout__title">Office of Research Services</div> <div class="callout__slogan"><em>Serving the NIH Community</em></div> </div><!-- /.callout__content --> <ul class="callout__actions usa-list usa-list--unstyled"> <li> <a href="https://www.ors.od.nih.gov/" class="usa-button ors-button">ORS Home</a> </li> <li> <a href="/signin/main?login_dest=%2Fresources%2Fbrowse-subjects" class="usa-button usa-button--unstyled login-button">Login</a> </li> </ul><!-- /.callout__actions --> </div> </div> </div> <div class="region--main-navigation"> <div class="grid-row flex-no-wrap padding-left-4 desktop-lg:padding-x-4"> <div class="nihl-library__nav-link"> <div class="grid-row nihl-library__nav-link__wrapper"> <a class="nihl-library__link" href="/" title="National Institutes of Health Library Home" aria-label="National Institutes of Health Library Home"> <span class="label">NIH Library</span> <span class="subtext flex-1">National Institutes of Health Library</span> </a> </div> </div> <button class="usa-menu-btn"> <svg viewBox="0 0 32 32" class="usa-icon menu-icon" aria-hidden="true" aria-label="menu" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#menu"></use> </svg> Menu </button> <nav class="usa-nav main-navigation" role="navigation" aria-label="main navigation"> <div class="usa-nav__inner desktop-lg:display-flex"> <button class="usa-nav__close"> <img src="/themes/custom/nih_library/assets/img/close-white-alt.svg" alt="close"/> </button> <div class="primary_menu-inner"> <ul class="usa-nav__primary usa-accordion" aria-label="resources-nih"> <li class="usa-nav__primary-item"> <button class="usa-accordion__button usa-nav__link usa-current" aria-expanded="false" aria-controls="extended-mega-nav-section-resources"> <span>Resources</span> <svg viewBox="0 0 32 32" class="usa-icon add-icon" aria-hidden="true" aria-label="open menu" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#add"></use> </svg> <svg viewBox="0 0 32 32" class="usa-icon remove-icon" aria-hidden="true" aria-label="close menu" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#remove"></use> </svg> </button> <div id="extended-mega-nav-section-resources" class="usa-nav__submenu nihl__submenu usa-megamenu" hidden=""> <div class="usa-nav__submenu-wrapper"> <div class="grid-row grid-gap-4"> <div class="grid-col"> <div class="usa-nav__submenu-item"> <span> <div class="usa-nav__duplicate-parent text-bold"> <a title="Library resources." class="usa-nav__link" href="/resources">Resources</a> </div> </span> </div> </div> </div> <div class="grid-row grid-gap-4"> <div class="desktop-lg:grid-col usa-nav__submenu-content usa-nav-submenu--databases"> <div class="usa-nav__submenu-item usa-nav__submenu-heading"> <span><strong>Databases</strong></span> </div> <ul id="basic-nav-section-databases" class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="https://onesearch.nihlibrary.ors.nih.gov/discovery/search?vid=01NIH_INST%3ANIH_Dbases" title="Search for Databases" class="usa-nav__link"> <span>Databases List</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://www.micromedexsolutions.com/micromedex2/librarian" title="Micromedex" class="usa-nav__link"> <span>Micromedex</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://online.lexi.com/" title="Lexicomp" class="usa-nav__link"> <span>Lexicomp</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://www.ncbi.nlm.nih.gov/sites/entrez?otool=nihlib" title="PubMed link from NIH" class="usa-nav__link"> <span>PubMed @ NIH</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://www.scopus.com" title="Scopus" class="usa-nav__link"> <span>Scopus</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://www.embase.com/" title="Embase" class="usa-nav__link"> <span>Embase</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://www.uptodate.com/contents/search" title="UpToDate" class="usa-nav__link"> <span>UpToDate</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://www.webofscience.com/wos/woscc/basic-search" title="Web of Science" class="usa-nav__link"> <span>Web of Science</span> </a> </li> </ul> </div> <div class="desktop-lg:grid-col usa-nav__submenu-content usa-nav-submenu--journals"> <div class="usa-nav__submenu-item usa-nav__submenu-heading"> <span><strong>Journals</strong></span> </div> <ul id="basic-nav-section-journals" class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="https://onesearch.nihlibrary.ors.nih.gov/discovery/jsearch?vid=01NIH_INST%3ANIH" title="Search our journal holdings" class="usa-nav__link"> <span>Journals Search</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="http://jama.ama-assn.org/contents-by-date.0.dtl" title="Journal of the American Medical Association" class="usa-nav__link"> <span>JAMA</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://www.jbc.org/issues" title="Journal of Biological Chemistry" class="usa-nav__link"> <span>Journal of Biological Chemistry</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://www.nejm.org/medical-index" title="New England Journal of Medicine" class="usa-nav__link"> <span>NEJM</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://www.nature.com/nature/volumes" title="Nature Journal" class="usa-nav__link"> <span>Nature</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="http://www.pnas.org/content/by/year" title="Proceedings of the National Academy of Sciences of the United States of America" class="usa-nav__link"> <span>PNAS</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://www.science.org/" title="Science Journal" class="usa-nav__link"> <span>Science</span> </a> </li> </ul> </div> <div class="desktop-lg:grid-col usa-nav__submenu-content usa-nav-submenu--other-research-tools"> <div class="usa-nav__submenu-item usa-nav__submenu-heading"> <span><strong>Other Research Tools</strong></span> </div> <ul id="basic-nav-section-other-research-tools" class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/resources/browse-subjects" title="Browse by Subject" class="usa-nav__link usa-current"> <span>Browse by Subject</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://onesearch.nihlibrary.ors.nih.gov/discovery/search?query=any%2Ccontains%2C%22%2A%22%2CAND&pfilter=rtype%2Cexact%2Cbooks%2CAND&tab=NIHCampus&search_scope=NIHAll&sortby=rank&vid=01NIH_INST%3ANIH&facet=tlevel%2Cinclude%2Conline_resources&mode=advanced&offset=0" title="eBooks Search" class="usa-nav__link"> <span>eBooks Search</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://onesearch.nihlibrary.ors.nih.gov/discovery/search?vid=01NIH_INST%3ANIH&lang=en" title="Online Catalog" class="usa-nav__link"> <span>Online Catalog</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/resources/subject-guides" title="Browse Subject Guides" class="usa-nav__link"> <span>Subject Guides</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/resources/tools" title="NIH Library equipment, software, and tools." class="usa-nav__link"> <span>Equipment, Software, & Tools</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/resources/hhs-digital-library" title="HHS Digital Library" class="usa-nav__link"> <span>HHS Digital Library</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://onesearch.nihlibrary.ors.nih.gov/discovery/account?vid=01NIH_INST%3ANIH&section=overview&lang=en" title="Renew checked-out books and materials" class="usa-nav__link"> <span>Renew Books</span> </a> </li> </ul> </div> </div> </div> </div> </li> </ul> <ul class="usa-nav__primary usa-accordion" aria-label="services"> <li class="usa-nav__primary-item"> <button class="usa-accordion__button usa-nav__link " aria-expanded="false" aria-controls="extended-mega-nav-section-services"> <span>Services</span> <svg viewBox="0 0 32 32" class="usa-icon add-icon" aria-hidden="true" aria-label="open menu" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#add"></use> </svg> <svg viewBox="0 0 32 32" class="usa-icon remove-icon" aria-hidden="true" aria-label="close menu" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#remove"></use> </svg> </button> <div id="extended-mega-nav-section-services" class="usa-nav__submenu nihl__submenu usa-megamenu" hidden=""> <div class="usa-nav__submenu-wrapper"> <div class="grid-row grid-gap-4"> <div class="grid-col"> <div class="usa-nav__submenu-item"> <span> <div class="usa-nav__duplicate-parent text-bold"> <a title="Services" class="usa-nav__link" href="/services">Services</a> </div> </span> </div> </div> </div> <div class="grid-row grid-gap-4"> <div class="desktop-lg:grid-col usa-nav__submenu-content usa-nav-submenu--library-services"> <div class="usa-nav__submenu-item usa-nav__submenu-heading"> <span><strong>Library Services</strong></span> </div> <ul id="basic-nav-section-library-services" class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/services/3d-printing-service" title="3D Printing" class="usa-nav__link"> <span>3D Printing</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/services/bibliometrics" title="Bibliometrics" class="usa-nav__link"> <span>Bibliometrics</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/services/bioinformatics-support" title="Bioinformatics" class="usa-nav__link"> <span>Bioinformatics</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/services/data" title="Data" class="usa-nav__link"> <span>Data</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/services/document-delivery" title="Document Delivery" class="usa-nav__link"> <span>Document Delivery</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/services/editing" title="Editing" class="usa-nav__link"> <span>Editing</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/services/evidence-synthesis" class="usa-nav__link"> <span>Evidence Synthesis</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/services/literature-search" title="Literature Search" class="usa-nav__link"> <span>Literature Search</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/services/multimedia" title="Multimedia Services" class="usa-nav__link"> <span>Multimedia</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/services/protocol-support" title="Protocol Support" class="usa-nav__link"> <span>Protocol Support</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/services/publication-consultation-services" title="Publication Consultation" class="usa-nav__link"> <span>Publication Consultation</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/services/training" title="Training Program" class="usa-nav__link"> <span>Training Program</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/services/translations" title="Translations" class="usa-nav__link"> <span>Translations</span> </a> </li> </ul> </div> <div class="desktop-lg:grid-col usa-nav__submenu-content usa-nav-submenu--facilities"> <div class="usa-nav__submenu-item usa-nav__submenu-heading"> <span><strong>Facilities</strong></span> </div> <ul id="basic-nav-section-facilities" class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/services/green-efforts" title="Green Efforts" class="usa-nav__link"> <span>Green Efforts</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/services/workspaces" title="Library Workspaces" class="usa-nav__link"> <span>Library Workspaces</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/signin/main" title="Log In and Remote Access" class="usa-nav__link"> <span>Log In and Remote Access</span> </a> </li> </ul> </div> </div> </div> </div> </li> </ul> <ul class="usa-nav__primary usa-accordion" aria-label="training-events"> <li class="usa-nav__primary-item"> <button class="usa-accordion__button usa-nav__link " aria-expanded="false" aria-controls="extended-mega-nav-section-training--events"> <span>Training & Events</span> <svg viewBox="0 0 32 32" class="usa-icon add-icon" aria-hidden="true" aria-label="open menu" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#add"></use> </svg> <svg viewBox="0 0 32 32" class="usa-icon remove-icon" aria-hidden="true" aria-label="close menu" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#remove"></use> </svg> </button> <div id="extended-mega-nav-section-training--events" class="usa-nav__submenu nihl__submenu usa-megamenu" hidden=""> <div class="usa-nav__submenu-wrapper"> <div class="grid-row grid-gap-4"> <div class="grid-col"> <div class="usa-nav__submenu-item"> <span> <div class="usa-nav__duplicate-parent text-bold"> <a title="Training & Events" class="usa-nav__link" href="/training/calendar">Training & Events</a> </div> </span> </div> </div> </div> <div class="grid-row grid-gap-4"> <div class="desktop-lg:grid-col usa-nav__submenu-content usa-nav-submenu--training-types"> <div class="usa-nav__submenu-item usa-nav__submenu-heading"> <span><strong>Training Types</strong></span> </div> <ul id="basic-nav-section-training-types" class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/training/calendar" title="Classes" class="usa-nav__link"> <span>Classes</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/training/course-catalog" title="Course Catalog" class="usa-nav__link"> <span>Course Catalog</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/events" class="usa-nav__link"> <span>Events</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/training/ondemand" class="usa-nav__link"> <span>On Demand Tutorials</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/get-help/consultations-tutorials" title="Request a Tutorial" class="usa-nav__link"> <span>Request a Tutorial</span> </a> </li> </ul> </div> </div> </div> </div> </li> </ul> <ul class="usa-nav__primary usa-accordion" aria-label="about-us"> <li class="usa-nav__primary-item"> <button class="usa-accordion__button usa-nav__link " aria-expanded="false" aria-controls="extended-mega-nav-section-about-us"> <span>About Us</span> <svg viewBox="0 0 32 32" class="usa-icon add-icon" aria-hidden="true" aria-label="open menu" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#add"></use> </svg> <svg viewBox="0 0 32 32" class="usa-icon remove-icon" aria-hidden="true" aria-label="close menu" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#remove"></use> </svg> </button> <div id="extended-mega-nav-section-about-us" class="usa-nav__submenu nihl__submenu usa-megamenu" hidden=""> <div class="usa-nav__submenu-wrapper"> <div class="grid-row grid-gap-4"> <div class="grid-col"> <div class="usa-nav__submenu-item"> <span> <div class="usa-nav__duplicate-parent text-bold"> <a title="About Us" class="usa-nav__link" href="/about-us">About Us</a> </div> </span> </div> </div> </div> <div class="grid-row grid-gap-4"> <div class="desktop-lg:grid-col usa-nav__submenu-content usa-nav-submenu--general-information"> <div class="usa-nav__submenu-item usa-nav__submenu-heading"> <span><strong>General Information</strong></span> </div> <ul id="basic-nav-section-general-information" class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="https://www.nihlibrary.nih.gov/about-us" class="usa-nav__link"> <span>About the Library</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/about-us/address-key-phone-numbers" title="Address & Key Phone Numbers" class="usa-nav__link"> <span>Address & Key Phone Numbers</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/about-us/news" title="Announcements & News" class="usa-nav__link"> <span>Announcements & News</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/about-us/hours-and-holiday-hours" title="Reading Room Hours & Holiday Closures" class="usa-nav__link"> <span>Library Hours</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/about-us/nih-library-collection-journals-books-databases" title="NIH Library Collection" class="usa-nav__link"> <span>NIH Library Collection</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/about-us/nih-library-statistics" title="NIH Library Statistics" class="usa-nav__link"> <span>NIH Library Statistics</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/about-us/nih-staff-directory" class="usa-nav__link"> <span>Staff Directory</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/about-us/staff-publications" title="Staff Publications" class="usa-nav__link"> <span>Staff Publications</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/about-us/vision-mission-guiding-principles" title="Vision, Mission, Guiding Principles" class="usa-nav__link"> <span>Vision, Mission, Guiding Principles</span> </a> </li> </ul> </div> <div class="desktop-lg:grid-col usa-nav__submenu-content usa-nav-submenu--policies--procedures"> <div class="usa-nav__submenu-item usa-nav__submenu-heading"> <span><strong>Policies & Procedures</strong></span> </div> <ul id="basic-nav-section-policies--procedures" class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/about-us/accessibility" title="Accessibility" class="usa-nav__link"> <span>Accessibility</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/public" title="For the Public" class="usa-nav__link"> <span>For the Public</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/library-privileges-and-borrowing" title="Library Privileges & Borrowing" class="usa-nav__link"> <span>Library Privileges & Borrowing</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/privacy-policy" title="Privacy Policy" class="usa-nav__link"> <span>Privacy Policy</span> </a> </li> </ul> </div> </div> </div> </div> </li> </ul> <ul class="usa-nav__primary usa-accordion" aria-label="get-help"> <li class="usa-nav__primary-item"> <button class="usa-accordion__button usa-nav__link " aria-expanded="false" aria-controls="extended-mega-nav-section-get-help"> <span>Get Help</span> <svg viewBox="0 0 32 32" class="usa-icon add-icon" aria-hidden="true" aria-label="open menu" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#add"></use> </svg> <svg viewBox="0 0 32 32" class="usa-icon remove-icon" aria-hidden="true" aria-label="close menu" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#remove"></use> </svg> </button> <div id="extended-mega-nav-section-get-help" class="usa-nav__submenu nihl__submenu usa-megamenu" hidden=""> <div class="usa-nav__submenu-wrapper"> <div class="grid-row grid-gap-4"> <div class="grid-col"> <div class="usa-nav__submenu-item"> <span> <div class="usa-nav__duplicate-parent text-bold"> <a title="Get Help" class="usa-nav__link" href="/get-help">Get Help</a> </div> </span> </div> </div> </div> <div class="grid-row grid-gap-4"> <div class="desktop-lg:grid-col usa-nav__submenu-content usa-nav-submenu--requests"> <div class="usa-nav__submenu-item usa-nav__submenu-heading"> <span><strong>Requests</strong></span> </div> <ul id="basic-nav-section-requests" class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/get-help/ask-question" title="Ask a Question" class="usa-nav__link"> <span>Ask a Question</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/get-help/consultations-tutorials" title="Consultations & Tutorials" class="usa-nav__link"> <span>Consultations & Tutorials</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/services/editing/editing-request" title="Editing Request" class="usa-nav__link"> <span>Editing Request</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/get-help/evidence-synthesis" title="Evidence Synthesis Request" class="usa-nav__link"> <span>Evidence Synthesis Request</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/get-help/literature-search-request" title="Literature Search Request" class="usa-nav__link"> <span>Literature Search Request</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="https://nihlibrary.ors.nih.gov/illiad/" title="Order an Article, Book, or Document" class="usa-nav__link"> <span>Order an Article, Book, or Document</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/get-help/report-problem" title="Report a Problem" class="usa-nav__link"> <span>Report a Problem</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/get-help/software-database-seat-license" title="Software or Database Seat License Registration" class="usa-nav__link"> <span>Software or Database Seat License</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/get-help/suggest-resource" title="Suggest a Resource" class="usa-nav__link"> <span>Suggest a Resource</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/get-help/suggest-training" title="Suggest a Training" class="usa-nav__link"> <span>Suggest a Training</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/get-help/translations-request" title="Translations Request" class="usa-nav__link"> <span>Translations Request</span> </a> </li> </ul> </div> <div class="desktop-lg:grid-col usa-nav__submenu-content usa-nav-submenu--additional-help"> <div class="usa-nav__submenu-item usa-nav__submenu-heading"> <span><strong>Additional Help</strong></span> </div> <ul id="basic-nav-section-additional-help" class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/get-help/find-your-librarian" title="Find Your Librarian" class="usa-nav__link"> <span>Find Your Librarian</span> </a> </li> <li class="usa-nav__submenu-item"> <a href="/get-help/faqs" title="NIH Library FAQs" class="usa-nav__link"> <span>NIH Library FAQs</span> </a> </li> </ul> </div> </div> </div> </div> </li> </ul> <div class="views-element-container block block-views block-views-blockquick-links-block-menu" id="block-views-block-quick-links-block-menu"> <div> <div class="js-view-dom-id-6768de83236bb111bdc0e9f5a2d5b8cd4d593e1a35a89e160a96035fa7af53e6 view--quick-links" id="quick_links"> <ul class="quick-links usa-nav__primary usa-accordion" role="navigation" aria-label="quick links"> <div class="usa-nav__primary-item"> <button class="usa-accordion__button usa-nav__link quick-links__button" aria-expanded="false" aria-controls="quick_links_menu"> <svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" width="24"><path d="M0 0h24v24H0z" fill="none"/><path d="M3.9 12c0-1.71 1.39-3.1 3.1-3.1h4V7H7c-2.76 0-5 2.24-5 5s2.24 5 5 5h4v-1.9H7c-1.71 0-3.1-1.39-3.1-3.1zM8 13h8v-2H8v2zm9-6h-4v1.9h4c1.71 0 3.1 1.39 3.1 3.1s-1.39 3.1-3.1 3.1h-4V17h4c2.76 0 5-2.24 5-5s-2.24-5-5-5z"/></svg> <span>QUICK LINKS</span> <svg viewBox="0 0 32 32" class="usa-icon add-icon" aria-hidden="true" aria-label="open menu" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#add"></use> </svg> <svg viewBox="0 0 32 32" class="usa-icon remove-icon" aria-hidden="true" aria-label="close menu" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#remove"></use> </svg> </button> <div id="quick_links_menu" class="quick-links__content usa-nav__submenu usa-megamenu" hidden> <div class="usa-nav__submenu-wrapper"> <div class="usa-nav__submenu-item quick-links__content-header"> <h3 class="usa-nav__duplicate-parent">QUICK LINKS</h3> </div> <div class="quick-links__wrapper grid-row grid-gap-4"> <div class="views-row"> <div class="paragraph paragraph--type--field-agency-quick-links paragraph--view-mode--quick-links"> <div class="usa-nav__submenu-item quick-links__submenu-item"> <strong>Databases</strong> </div> <ul class="usa-list usa-list--unstyled usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="https://onesearch.nihlibrary.ors.nih.gov/discovery/search?vid=01NIH_INST%3ANIH_Dbases">Databases List</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="https://www.embase.com/#search">Embase</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="https://www.micromedexsolutions.com/micromedex2/librarian/">Micromedex</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="https://pubmed.ncbi.nlm.nih.gov/?otool=nihlib">PubMed @ NIH</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="https://www.scopus.com/home.uri">Scopus</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="https://www.uptodate.com/contents/search">UpToDate</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="http://webofknowledge.com/WOS">Web of Science</a> </li> </ul> </div> </div> <div class="views-row"> <div class="paragraph paragraph--type--field-agency-quick-links paragraph--view-mode--quick-links"> <div class="usa-nav__submenu-item quick-links__submenu-item"> <strong>Journals</strong> </div> <ul class="usa-list usa-list--unstyled usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="https://onesearch.nihlibrary.ors.nih.gov/discovery/jsearch?vid=01NIH_INST%3ANIH">Journals Search</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="http://jama.ama-assn.org/contents-by-date.0.dtl">JAMA</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="https://www.jbc.org/issues">Journal of Biological Chemistry</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="https://www.nature.com/nature/">Nature</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="https://www.nejm.org/medical-index">NEJM</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="https://www.science.org/">Science</a> </li> </ul> </div> </div> <div class="views-row"> <div class="paragraph paragraph--type--field-agency-quick-links paragraph--view-mode--quick-links"> <div class="usa-nav__submenu-item quick-links__submenu-item"> <strong>Other Research Tools</strong> </div> <ul class="usa-list usa-list--unstyled usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="/resources/browse-subjects">Browse by Subject</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="https://onesearch.nihlibrary.ors.nih.gov/discovery/search?query=any%2Ccontains%2C%22%2A%22%2CAND&pfilter=rtype%2Cexact%2Cbooks%2CAND&tab=NIHCampus&search_scope=NIHAll&sortby=rank&vid=01NIH_INST%3ANIH&facet=tlevel%2Cinclude%2Conline_resources&mode=advanced&offset=0">eBooks Search</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="/resources/subject-guides/endnote">EndNote</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="https://onesearch.nihlibrary.ors.nih.gov/discovery/search?vid=01NIH_INST%3ANIH&sortby=rank">Online Catalog</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="/signin/main">Remote Access</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="https://onesearch.nihlibrary.ors.nih.gov/discovery/account?vid=01NIH_INST%3ANIH&section=overview&lang=en">Renew Books</a> </li> <li class="usa-nav__submenu-item"> <a class="usa-nav__link" href="/resources/subject-guides">Subject Guides</a> </li> </ul> </div> </div> </div> </div> </div> </div> </ul> </div> </div> </div> </div> <div class="website-search-form block block-nihl-theme block-nihl-theme-website-search-block" data-drupal-selector="website-search-form"> <form action="/resources/browse-subjects" method="post" id="website-search-form" accept-charset="UTF-8" class="usa-form"> <div class="form-item usa-label js-form-item form-type-search js-form-type-search form-item-search js-form-item-search form-no-label"> <label for="edit-search" class="usa-label control-label usa-sr-only">NIHL Search</label> <input data-drupal-selector="edit-search" type="search" id="edit-search" name="search" value="" size="30" maxlength="254" placeholder="Search website" class="form-search usa-input" /> </div> <input data-drupal-selector="form-o3gmh0sp6bwilrouasq0u5hbqkxhfncptepbmieoaug" type="hidden" name="form_build_id" value="form-O3gmh0sp6BWILRouasQ0u5HbQkxHfncptepBMIEOAUg" class="usa-input" /> <input data-drupal-selector="edit-website-search-form" type="hidden" name="form_id" value="website_search_form" class="usa-input" /> <div data-drupal-selector="edit-actions" class="form-actions js-form-wrapper form-wrapper" id="edit-actions"> <input data-drupal-selector="edit-submit" type="submit" id="edit-submit" name="op" value="Search" class="button js-form-submit form-submit usa-button" /> </div> </form> </div> </div> </nav> </div> </div> </header> <main class="main-content usa-layout-docs " role="main" id="main-content"> <div class="region region-breadcrumb"> <div class="grid-container"> <div> <div id="block-nih-library-breadcrumbs" class="block block-system block-system-breadcrumb-block"> <nav class="usa-breadcrumb" role="navigation" aria-labelledby="system-breadcrumb"> <h2 id="system-breadcrumb" class="usa-sr-only">Breadcrumb</h2> <ol class="usa-breadcrumb__list"> <li class="usa-breadcrumb__list-item"> <a href="/" class="usa-breadcrumb__link"><span>Home</span></a> </li> <li class="usa-breadcrumb__list-item"> <a href="/resources" class="usa-breadcrumb__link"><span>Resources</span></a> </li> <li class="usa-breadcrumb__list-item"> <span>Browse by Subject</span> </li> </ol> </nav> </div> </div> </div> </div> <div class="grid-container"> <div class="highlighted"> <div data-drupal-messages-fallback class="hidden"></div> </div> <div class="grid-row grid-gap"> <div class="usa-layout-docs__main desktop:grid-col-fill"> <div> <h1 class="page-title desktop:font-heading-2xl line-height-heading-2">Browse by Subject</h1> </div> <div id="block-nih-library-content" class="block block-system block-system-main-block"> <div class="views-element-container"><div class="js-view-dom-id-970356773bee919271dace39b2f8273f6085cfb830acb1dc2cc9b6d486d82de3 view--nih-subjects" id="nih_subjects"> <div> <ul class="usa-list usa-list--unstyled nihl-list nihl-subject-list"> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A1">Administrative</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A3211">Aging</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A2">AIDS/HIV</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A3">Alternative Medicine</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A4">Anatomy</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A5">Anesthesiology</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A3216">Autoimmune Disease</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A3241">Behavioral Sciences</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A6">Biochemistry</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A7">Bioinformatics</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A3381">Biology</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A8">Biomedical Engineering</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A67936">Biostatistics</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A826">Biotechnology</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A9">Bioterrorism</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A10">Cardiology</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A11">Chemistry</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A3221">Clinical Research</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A12">Computer Science</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A13">Cytology</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A3206">Data Science</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A14">Dentistry</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A15">Dermatology</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A16">Diagnostic Imaging</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A3251">Emergency Management</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A18">Emergency Medicine</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A541">Emerging Technology</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A20">Endocrinology and Metabolism</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A3386">Environmental Health</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A21">Ethics</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A22">Evidence-Based Practice</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A23">Gastroenterology</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A4176">General</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A24">General Medicine</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A25">Genetics</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A26">Geriatrics</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A31">Health Administration</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A3256">Health Disparities</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A27">Health Economics</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A3261">Health Policy</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A28">Health Populations</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A29">Health Quality and Evaluation</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A30">Health Services</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A32">Hematology</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A33">Immunology</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A34">Infectious Diseases</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A35">Internal Medicine</a></li> <li class="nihl-subject-list__item"><a class="nihl-link--card" href="/search/site?f[0]=sm_field_nih_subject%3A5181">Laboratory Medicine</a></li> </ul> </div> <nav class="pager" role="navigation" aria-labelledby="pagination-heading"> <h4 id="pagination-heading" class="usa-sr-only">Pagination</h4> <ul class="usa-nav__primary usa-accordion js-pager__items"> <li class="usa-nav__primary-item pages is-active"> <a href="?page=0" title="Current page" aria-current="page"> <span class="usa-sr-only"> Current page </span>1</a> </li> <li class="usa-nav__primary-item pages "> <a href="?page=1" title="Go to page 2"> <span class="usa-sr-only"> Page </span>2</a> </li> <li class="usa-nav__primary-item pager-link"> <a href="?page=1" title="Go to next page" rel="next"> <span class="usa-sr-only">Next page</span> <span aria-hidden="true">›</span> </a> </li> <li class="usa-nav__primary-item pager-link"> <a href="?page=1" title="Go to last page"> <span class="usa-sr-only">Last page</span> <span aria-hidden="true">»</span> </a> </li> </ul> </nav> </div> </div> </div> </div> </div> </div> </main> <footer class="usa-footer usa-footer--big" role="contentinfo"> <div class="usa-footer__primary-section"> <div class="usa-footer__primary-content"> <div class="grid-container"> <div class="grid-row grid-gap"> </div> </div> <div class="grid-container"> <div class="grid-row flex-justify grid-gap"> <div class="usa-footer__logo desktop:grid-col-4"> <div class="usa-footer__contact"> <h3 class="usa-footer__contact-heading">Contact NIH Library</h3> <address class="usa-footer__address"> <div class="usa-footer__address-info"> <span class="info-label"><strong>Address</strong></span> <span class="info-data">NIH Library in Building 10 Bethesda, MD 20892</span> </div> <div class="usa-footer__contact-info"> <div class="usa-footer__contact-phone"> <span class="info-label"><strong>Phone</strong></span><a href="tel:301-496-1080" class="info-data">301-496-1080</a> </div> <div class="usa-footer__contact-hours"> <span class="info-label"><strong>Today's Hours</strong></span> <span class="info-data"> 01:00 PM to 01:00 PM </span> </div> </div> </address> </div> </div> <div class="grid-container footer__main-menu tablet:grid-col-4 desktop:grid-col-3"> <div class="grid-row grid-gap"> <div class="grid-col-fill"> <nav role="navigation" aria-labelledby="block-nih-library-footer-menu" id="block-nih-library-footer"> <h3 id="block-nih-library-footer-menu">Menu</h3> <ul data-region="footer_menu" class="menu menu--footer nav"> <li class="first"> <a href="/resources" title="Library resources." class="first" data-drupal-link-system-path="node/4">Resources</a> </li> <li> <a href="/services" title="Services" data-drupal-link-system-path="node/5">Services</a> </li> <li> <a href="/training/calendar" title="Training & Events" data-drupal-link-system-path="training/calendar">Training & Events</a> </li> <li> <a href="/about-us" title="About Us" data-drupal-link-system-path="node/6">About Us</a> </li> <li class="last"> <a href="/get-help" title="Get Help" class="last" data-drupal-link-system-path="node/7">Get Help</a> </li> </ul> </nav> </div> </div> </div> <div class="grid-container tablet:grid-col-4 desktop:grid-col-2 desktop-lg:grid-col-3"> <div class="grid-row grid-gap"> <div class="grid-col-fill"> <div> <nav role="navigation" aria-labelledby="block-footerextras-menu" id="block-footerextras"> <h3 class="usa-sr-only" id="block-footerextras-menu">Menu Footer Extras</h3> <ul class="menu menu--footer-extras nav"> <li class="first"> <a href="https://forms.office.com/g/mPps926JuT" class="first">Provide Feedback</a> </li> <li> <a href="/get-help/ask-question" title="Login">Ask a Question</a> </li> <li> <a href="https://list.nih.gov/cgi-bin/wa.exe?SUBED1=NIHLIB-L&A=1" title="Email Updates">Email Updates</a> </li> <li class="last"> <a href="/signin/main" class="last">Login</a> </li> </ul> </nav> </div> </div> </div> </div> <div class="usa-footer__contact-links tablet:grid-col-4 desktop:grid-col-3 desktop-lg:grid-col-2"> <h3>Connect With Us</h3> <div class="usa-footer__social-links grid-row grid-gap-1"> <div class="grid-col-auto"> <a class="usa-social-link usa-social-link--facebook" href="https://www.facebook.com/nihlibrary" target="_blank" rel="noopener noreferrer"> <svg viewBox="0 0 32 32" class="usa-icon facebook-icon" aria-hidden="true" aria-label="facebook icon" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#facebook"></use> </svg> <span class="usa-sr-only">Facebook</span> </a> </div> <div class="grid-col-auto"> <a class="usa-social-link usa-social-link--youtube" href="https://www.youtube.com/user/NIHLibrary" target="_blank" rel="noopener noreferrer"> <svg viewBox="0 0 32 32" class="usa-icon youtube-icon" aria-hidden="true" aria-label="youtube icon" role="img"> <use href="/themes/custom/nih_library/assets/img/sprite.svg#youtube"></use> </svg> <span class="usa-sr-only">YouTube</span> </a> </div> </div> </div> </div> </div> </div> </div> </div> <div class="usa-footer__secondary-section"> <div class="grid-container"> <div class="grid-row grid-gap"> <div class="tablet:grid-container"> <div class="grid-row grid-gap"> <div class="grid-col-fill"> <div> <nav role="navigation" aria-labelledby="block-footertop-menu" id="block-footertop"> <h3 class="usa-sr-only" id="block-footertop-menu">Menu Footer Top</h3> <ul class="menu menu--footer-top nav"> <li class="first"> <a href="https://www.nih.gov/about/privacy.htm" title="NHIL Privacy page link" class="first">Privacy</a> </li> <li> <a href="https://www.nih.gov/about/disclaim.htm" title="NHIL Disclaimer page link">Disclaimer</a> </li> <li> <a href="https://ors.od.nih.gov/pages/accessibility.aspx" title="NHIL Accessibility page link">Accessibility</a> </li> <li> <a href="https://www.nih.gov/icd/od/foia/index.htm" title="NHIL FOIA page link">FOIA</a> </li> <li class="last"> <a href="https://www.hhs.gov/vulnerability-disclosure-policy/index.html" class="last">HHS Vulnerability Disclosure</a> </li> </ul> </nav> <nav role="navigation" aria-labelledby="block-footersecond-menu" id="block-footersecond"> <h3 class="usa-sr-only" id="block-footersecond-menu">Menu Footer Second</h3> <ul class="menu menu--footer-second nav"> <li class="first"> <a href="https://www.usa.gov/" title="USA.gov-Government Made Easy" class="first">USA.gov-Government Made Easy</a> </li> <li> <a href="https://www.hhs.gov/" title="U.S. Department of Health and Human Services">U.S. Department of Health and Human Services</a> </li> <li class="last"> <a href="https://www.nih.gov/" title="National Institutes of Health" class="last">National Institutes of Health</a> </li> </ul> </nav> <nav role="navigation" aria-labelledby="block-footerthird-menu" id="block-footerthird"> <h3 class="usa-sr-only" id="block-footerthird-menu">Menu Footer Third</h3> <ul class="menu menu--footer-third nav"> <li class="first"> <a href="https://om.od.nih.gov/" title="Office of Management" class="first">Office of Management</a> </li> <li> <a href="https://www.ors.od.nih.gov/" title="Office of Research Services">Office of Research Services</a> </li> <li class="last"> <a href="/" title="National Institutes of Health Library" class="last" data-drupal-link-system-path="<front>">National Institutes of Health Library</a> </li> </ul> </nav> </div> </div> </div> </div> </div> </div> </footer> </div> <script id="Microsoft_Omnichannel_LCWidget" src="https://ocprodocprodnamgs.blob.core.usgovcloudapi.net/livechatwidget/scripts/LiveChatBootstrapper.js" data-app-id="cada0593-ab18-4059-9256-6d5f05cb8a91" data-lcw-version="prod" data-org-id="3c5ba7b1-02e5-40a0-b557-36edd7012632" data-org-url=https://org48e5f7f0-crm9.omnichannelengagementhub.us></script> <script type="application/json" data-drupal-selector="drupal-settings-json">{"path":{"baseUrl":"\/","pathPrefix":"","currentPath":"resources\/browse-subjects","currentPathIsAdmin":false,"isFront":false,"currentLanguage":"en"},"pluralDelimiter":"\u0003","suppressDeprecationErrors":true,"google_analytics":{"account":"UA-26862354-2","trackOutbound":true,"trackMailto":true,"trackTel":true,"trackDownload":true,"trackDownloadExtensions":"7z|aac|arc|arj|asf|asx|avi|bin|csv|doc(x|m)?|dot(x|m)?|exe|flv|gif|gz|gzip|hqx|jar|jpe?g|js|mp(2|3|4|e?g)|mov(ie)?|msi|msp|pdf|phps|png|ppt(x|m)?|pot(x|m)?|pps(x|m)?|ppam|sld(x|m)?|thmx|qtm?|ra(m|r)?|sea|sit|tar|tgz|torrent|txt|wav|wma|wmv|wpd|xls(x|m|b)?|xlt(x|m)|xlam|xml|z|zip"},"data":{"extlink":{"extTarget":true,"extTargetAppendNewWindowLabel":"(opens in a new window)","extTargetNoOverride":false,"extNofollow":false,"extNoreferrer":true,"extFollowNoOverride":false,"extClass":"ext","extLabel":"(link is external)","extImgClass":false,"extSubdomains":true,"extExclude":"^https?:\/\/[^\/]+\/ezpsignout$","extInclude":"","extCssExclude":".add-to-cal","extCssInclude":"","extCssExplicit":"","extAlert":false,"extAlertText":"This link will take you to an external web site. We are not responsible for their content.","extHideIcons":false,"mailtoClass":"mailto","telClass":"","mailtoLabel":"(link sends email)","telLabel":"(link is a phone number)","extUseFontAwesome":false,"extIconPlacement":"append","extFaLinkClasses":"fa fa-external-link","extFaMailtoClasses":"fa fa-envelope-o","extAdditionalLinkClasses":"","extAdditionalMailtoClasses":"","extAdditionalTelClasses":"","extFaTelClasses":"fa fa-phone","whitelistedDomains":["www.ors.od.nih.gov"],"extExcludeNoreferrer":""}},"ajaxTrustedUrl":{"form_action_p_pvdeGsVG5zNF_XLGPTvYSKCf43t8qZYSwcfZl2uzM":true},"user":{"uid":0,"permissionsHash":"19fc79c6cc2f29d080a7a11b37fc5a8b9f34eeccc1d93b5141dc092ea41cba7c"}}</script> <script src="/sites/default/files/js/js_LG1o1oFUoodM1s3FEUJgZ6dhUEvWCDHUlNJnvmM_JIo.js?scope=footer&delta=0&language=en&theme=nih_library&include=eJxLz89Pz0mNT8xLzKksyUwu1k9HE9DJy8yIz8lMKkosqtRPLC5OLSnWSa0oycnMy9ZPKSotSMzRg3IBeXgeCA"></script> </body> </html>