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class="ammenu-menu-overlay" data-ammenu-js="menu-overlay"></div> <div class="top-container"><div class="widget block block-static-block"> <style>#html-body [data-pb-style=FQPU2T1]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll;border-style:none;border-width:1px;border-radius:0;margin:0 0 10px;padding:10px}#html-body [data-pb-style=QNT5NVB]{border-style:none;border-width:1px;border-radius:0;margin:0;padding:0}</style><div data-content-type="row" data-appearance="contained" data-element="main"><div data-enable-parallax="0" data-parallax-speed="0.5" data-background-images="{}" data-video-fallback-src="" data-element="inner" data-pb-style="FQPU2T1"><div data-content-type="html" data-appearance="default" data-element="main" data-pb-style="QNT5NVB" data-decoded="true"><div class="widget widget-banner small-covid-banner"> <ul> <li> <style type="text/css">.widget-banner ul {margin:0px;padding:0px 0px 10px 0px !important;} div.banner-area {margin-top:0px !important;}</style> <div class="hide-for-small-only"> <p style="background:#ff6c00;"><a href="/digital-subscription-products" style="font-size:3rem !important;" title="Up to 35% off Personal Digital Subscriptions">Up to 35% off Personal Digital Subscriptions</a></p> </div> </li> </ul> </div></div></div></div></div> </div> <main id="maincontent" class="page-main"><a id="contentarea" tabindex="-1"></a> <div class="page messages"><div data-placeholder="messages"></div> <div data-bind="scope: 'messages'"> <!-- ko if: cookieMessagesObservable() && cookieMessagesObservable().length > 0 --> <div aria-atomic="true" role="alert" class="messages" data-bind="foreach: { data: cookieMessagesObservable(), as: 'message' }"> <div data-bind="attr: { class: 'message-' + message.type + ' ' + message.type + ' message', 'data-ui-id': 'message-' + message.type }"> <div data-bind="html: $parent.prepareMessageForHtml(message.text)"></div> </div> </div> <!-- /ko --> <div aria-atomic="true" role="alert" class="messages" data-bind="foreach: { data: messages().messages, as: 'message' }, afterRender: purgeMessages"> <div data-bind="attr: { class: 'message-' + message.type + ' ' + message.type + ' message', 'data-ui-id': 'message-' + message.type }"> <div data-bind="html: $parent.prepareMessageForHtml(message.text)"></div> </div> </div> </div> </div><div class="columns"><div class="column main"><!-- Nosto Cart Tagging --> <div class="nosto_cart_hidden" style="display:none" data-bind="scope: 'cartTagging'" data-role="nosto-cart-tagging" id="nosto_cart_tagging"> <span class="hcid" data-bind="text: cartTagging().hcid"></span> <span class="restore_link" data-bind="text: cartTagging().restore_cart_url"></span> <!-- ko if: cartTagging().itemCount > 0 --> <!-- ko foreach: {data: cartTagging().items, afterRender: sendTagging } --> <div class="line_item"> <span class="product_id" data-bind="text: $data.product_id"></span> <span class="sku_id" data-bind="text: $data.sku_id"></span> <span class="quantity" data-bind="text: $data.quantity"></span> <span class="name" data-bind="text: $data.name"></span> <span class="unit_price" data-bind="text: $data.unit_price"></span> <span class="price_currency_code" data-bind="text: $data.price_currency_code"></span> </div> <!-- /ko --> <!-- /ko --> </div> <!--suppress JSUnresolvedVariable --> <!-- Nosto Variation Tagging --> <div id="nosto_variation_tagging" style="display:none" data-bind="scope: 'variationTagging'" data-role="nosto-variation-tagging" > <!-- ko if: variationTagging().active_variation --> <span class="nosto_variation_dynamic" data-bind="text: variationTagging().active_variation, afterRender: reloadRecommendations"></span> <!-- /ko --> </div> <!--suppress JSUnresolvedVariable --> <!-- Nosto Customer Tagging --> <div id="nosto_customer_tagging" class="nosto_customer_hidden" style="display:none" data-bind="scope: 'customerTagging'" data-role="nosto-customer-tagging"> <!-- ko if: customerTagging().first_name --> <!-- ko foreach: {data: customerTagging(), afterRender: sendTagging } --> <span class="first_name" data-bind="text: $data.first_name"></span> <span class="last_name" data-bind="text: $data.last_name"></span> <span class="email" data-bind="text: $data.email"></span> <span class="hcid" data-bind="text: $data.hcid"></span> <span class="customer_reference" data-bind="text: $data.customer_reference"></span> <span class="marketing_permission" data-bind="text: $data.marketing_permission"></span> <span class="date_of_birth" data-bind="text: $data.date_of_birth"></span> <span class="customer_group" data-bind="text: $data.customer_group"></span> <span class="gender" data-bind="text: $data.gender"></span> <!-- /ko --> <!-- /ko --> </div> <!--suppress JSUnresolvedVariable --> <input name="form_key" type="hidden" value="VcpYDRYbVp752ygk" /><div id="authenticationPopup" data-bind="scope:'authenticationPopup', style: {display: 'none'}"> <!-- ko template: getTemplate() --><!-- /ko --> </div> <div data-mage-init='{"Mirasvit_Feed\/js\/report245":[]}'></div><style>#html-body [data-pb-style=BP3Y9GB]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll;border-style:none;border-width:1px;border-radius:0;margin:0 0 10px;padding:10px}#html-body [data-pb-style=DDYVUL8],#html-body [data-pb-style=E3JMXTU]{border-style:none;border-width:1px;border-radius:0;margin:0;padding:0}</style><div data-content-type="row" data-appearance="contained" data-element="main"><div data-enable-parallax="0" data-parallax-speed="0.5" data-background-images="{}" data-video-fallback-src="" data-element="inner" data-pb-style="BP3Y9GB"><div data-content-type="html" data-appearance="default" data-element="main" data-pb-style="DDYVUL8" data-decoded="true"><div class="blur"></div> <div class="widget block block-static-block"> <style>#html-body [data-pb-style=JDISOB4]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll}#html-body [data-pb-style=OL2KOUR]{display:none}#html-body [data-pb-style=PHE711A]{background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll}#html-body [data-pb-style=CS157NJ]{border-radius:0;min-height:260px;background-color:transparent}#html-body [data-pb-style=PPUBA07]{border-style:none}#html-body [data-pb-style=ASJWRUY],#html-body [data-pb-style=VTFND5L]{max-width:100%;height:auto}#html-body [data-pb-style=RWD12HQ]{justify-content:flex-start;display:flex;flex-direction:column;background-color:#000;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll}#html-body [data-pb-style=LVHBD9S]{display:none}#html-body [data-pb-style=QP4I0PU]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll}#html-body [data-pb-style=S5F2025]{display:none}#html-body [data-pb-style=NMUDK3C]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll}#html-body [data-pb-style=PFW8U59]{min-height:300px;padding:0}#html-body [data-pb-style=YBM6XAQ]{background-position:left top;background-size:cover;background-repeat:no-repeat;min-height:260px}#html-body [data-pb-style=CPTA55K]{min-height:260px;padding-left:0;padding-top:0;padding-right:0;background-color:transparent}#html-body [data-pb-style=BW1770R]{background-position:left top;background-size:cover;background-repeat:no-repeat;min-height:260px}#html-body [data-pb-style=E9XC7YS]{min-height:260px;padding-left:0;padding-top:0;padding-right:0;background-color:transparent}#html-body [data-pb-style=U88C0EF]{background-position:left top;background-size:cover;background-repeat:no-repeat;min-height:260px}#html-body [data-pb-style=UB5RL5F]{min-height:260px;padding-left:0;padding-top:0;padding-right:0;background-color:transparent}@media only screen and (max-width: 768px) { #html-body [data-pb-style=PPUBA07]{border-style:none} }</style><div data-content-type="row" data-appearance="contained" data-element="main"><div data-enable-parallax="0" data-parallax-speed="0.5" data-background-images="{}" data-background-type="image" data-video-loop="true" data-video-play-only-visible="true" data-video-lazy-load="true" data-video-fallback-src="" data-element="inner" data-pb-style="JDISOB4"><div data-content-type="banner" data-appearance="poster" data-show-button="never" data-show-overlay="never" data-element="main" data-pb-style="OL2KOUR"><a href="/black-friday" target="" data-link-type="default" title="2024 Black Friday Sale. Save up to forty percent off Books, eBooks, Journals, and select Personal Digital Subscription products." data-element="link"><div class="pagebuilder-banner-wrapper background-image-674838cac4277 background-image-674838cac557d" data-background-images='{\"desktop_image\":\"https://www.us.elsevierhealth.com/media/wysiwyg/BF24-hp_14.png\",\"mobile_image\":\"https://www.us.elsevierhealth.com/media/wysiwyg/BF24-hp-mobile_15.png\"}' data-background-type="image" data-video-loop="true" data-video-play-only-visible="true" data-video-lazy-load="true" data-video-fallback-src="" data-element="wrapper" data-pb-style="PHE711A"><div class="pagebuilder-overlay pagebuilder-poster-overlay" data-overlay-color="" aria-label="2024 Black Friday Sale. Save up to forty percent off Books, eBooks, Journals, and select Personal Digital Subscription products." title="2024 Black Friday Sale. Save up to forty percent off Books, eBooks, Journals, and select Personal Digital Subscription products." data-element="overlay" data-pb-style="CS157NJ"><div class="pagebuilder-poster-content"><div data-element="content"></div></div></div></div><style type="text/css">.background-image-674838cac4277 {background-image: url(https://www.us.elsevierhealth.com/media/wysiwyg/BF24-hp_14.png);}@media only screen and (max-width: 768px) and (min-width: 640px) {.background-image-674838cac4277 {background-image: url(https://www.us.elsevierhealth.com/media/wysiwyg/BF24-hp-mobile_15.png);}}@media only screen and (max-width: 640px) {.background-image-674838cac4277 {background-image: url(https://www.us.elsevierhealth.com/media/wysiwyg/BF24-hp-mobile_15.png);}}</style><style type="text/css">.background-image-674838cac557d {background-image: url(https://www.us.elsevierhealth.com/media/wysiwyg/BF24-hp_14.png);}@media only screen and (max-width: 768px) and (min-width: 640px) {.background-image-674838cac557d {background-image: url(https://www.us.elsevierhealth.com/media/wysiwyg/BF24-hp-mobile_15.png);}}@media only screen and (max-width: 640px) {.background-image-674838cac557d {background-image: url(https://www.us.elsevierhealth.com/media/wysiwyg/BF24-hp-mobile_15.png);}}</style></a></div><figure data-content-type="image" data-appearance="full-width" data-element="main" data-pb-style="PPUBA07"><a href="/black-friday" target="" data-link-type="default" title="2024 Black Friday Sale. Save up to forty percent off Books, eBooks, Journals, and select Personal Digital Subscription products." data-element="link"><img class="pagebuilder-mobile-hidden" src="https://www.us.elsevierhealth.com/media/wysiwyg/BF24-hp_18.png" alt="2024 Black Friday Sale. Save up to forty percent off Books, eBooks, Journals, and select Personal Digital Subscription products." title="2024 Black Friday Sale. Save up to forty percent off Books, eBooks, Journals, and select Personal Digital Subscription products." data-element="desktop_image" data-pb-style="ASJWRUY"><img class="pagebuilder-mobile-only" src="https://www.us.elsevierhealth.com/media/wysiwyg/BF24-hp-mobile_19.png" alt="2024 Black Friday Sale. Save up to forty percent off Books, eBooks, Journals, and select Personal Digital Subscription products." title="2024 Black Friday Sale. Save up to forty percent off Books, eBooks, Journals, and select Personal Digital Subscription products." data-element="mobile_image" data-pb-style="VTFND5L"></a></figure><div data-content-type="text" data-appearance="default" data-element="main"><p style="text-align: right;"><a tabindex="0" title="Sale Disclaimer" href="/sale-disclaimer" target="_blank" rel="noopener">Sale Disclaimer</a></p></div></div></div><div data-content-type="row" data-appearance="contained" data-element="main"><div data-enable-parallax="0" data-parallax-speed="0.5" data-background-images="{}" data-background-type="image" data-video-loop="true" data-video-play-only-visible="true" data-video-lazy-load="true" data-video-fallback-src="" data-element="inner" data-pb-style="RWD12HQ"><div data-content-type="html" data-appearance="default" data-element="main" data-decoded="true"><div class="expires">Black Friday offer ends in <span id="demo"></span></div> <style> #demo { font-size: 40px; color: #ff6c00; font-weight: bold; margin-bottom: 1%; margin-top: 1%; } .expires { font-size: 40px; text-align: center; color: #fff; margin-bottom: 1%; margin-top: 1%; } @media only screen and (min-width: 1150px) and (max-width: 1300px) { #demo { font-size: 35px; color: #ff6c00; } .expires { font-size: 35px; text-align: center; color: #fff; } } @media only screen and (min-width: 1000px) and (max-width: 1149px) { #demo { font-size: 32px; color: #ff6c00; } .expires { font-size: 32px; text-align: center; color: #fff; } } @media only screen and (min-width: 700px) and (max-width: 999px) { #demo { font-size: 25px; color: #ff6c00; } .expires { font-size: 25px; text-align: center; color: #fff; } } @media only screen and (max-width: 699px) { #demo { font-size: 15px; color: #ff6c00; } .expires { font-size: 15px; text-align: center; color: #fff; } } </style> </div></div></div><div data-content-type="row" data-appearance="contained" data-element="main" data-pb-style="LVHBD9S"><div data-enable-parallax="0" data-parallax-speed="0.5" data-background-images="{}" data-background-type="image" data-video-loop="true" data-video-play-only-visible="true" data-video-lazy-load="true" data-video-fallback-src="" data-element="inner" data-pb-style="QP4I0PU"><div data-content-type="html" data-appearance="default" data-element="main" data-decoded="true"><a href="/clinicalkey"> <div class="widget block block-banners" data-bind="scope: 'banner'" data-banner-id="6745216b889575ae31891a2292c0aa569db517744a1215e42dc9048aef280f6e" data-types="content" data-display-mode="fixed" data-ids="21,22" data-rotate="random" data-store-id="2" data-banner-name="ClinicalKey 2023 Banner #1 - Banner Image Only" data-banner-status="Enabled"> <ul class="banner-items" data-bind="afterRender: registerBanner"> <!-- ko foreach: getItems6745216b889575ae31891a2292c0aa569db517744a1215e42dc9048aef280f6e() --> <li class="banner-item" data-bind="attr: {'data-banner-id': $data.bannerId}"> <div class="banner-item-content" data-bind="bindHtml: $data.html"></div> </li> <!-- /ko --> </ul> </div> </a></div></div></div><div data-content-type="row" data-appearance="contained" data-element="main" data-pb-style="S5F2025"><div data-enable-parallax="0" data-parallax-speed="0.5" data-background-images="{}" data-background-type="image" data-video-loop="true" data-video-play-only-visible="true" data-video-lazy-load="true" data-video-fallback-src="" data-element="inner" data-pb-style="NMUDK3C"><div class="pagebuilder-slider" data-content-type="slider" data-appearance="default" data-autoplay="true" data-autoplay-speed="6000" data-fade="false" data-infinite-loop="true" data-show-arrows="false" data-show-dots="true" data-element="main" data-pb-style="PFW8U59"><div data-content-type="slide" data-slide-name="" data-appearance="poster" data-show-button="never" data-show-overlay="never" data-element="main"><div data-element="empty_link"><div class="pagebuilder-slide-wrapper" data-background-images="{}" data-background-type="image" data-video-loop="true" data-video-play-only-visible="true" data-video-lazy-load="true" data-video-fallback-src="" data-element="wrapper" data-pb-style="YBM6XAQ"><div class="pagebuilder-overlay pagebuilder-poster-overlay" data-overlay-color="" aria-label="" title="" data-element="overlay" data-pb-style="CPTA55K"><div class="pagebuilder-poster-content"><div data-element="content"><p></p><div class="widget block block-static-block"> <style>#html-body [data-pb-style=HQ5U0Q1],#html-body [data-pb-style=Q19FMLO]{background-position:center center;background-repeat:no-repeat;background-attachment:scroll}#html-body [data-pb-style=Q19FMLO]{justify-content:flex-start;display:flex;flex-direction:column;background-size:cover}#html-body [data-pb-style=HQ5U0Q1]{background-size:contain;min-height:260px}#html-body [data-pb-style=BFC13NP]{background-color:transparent}</style><div data-content-type="row" data-appearance="contained" data-element="main"><div data-enable-parallax="0" data-parallax-speed="0.5" data-background-images="{}" data-background-type="image" data-video-loop="true" data-video-play-only-visible="true" data-video-lazy-load="true" data-video-fallback-src="" data-element="inner" data-pb-style="Q19FMLO"><div data-content-type="banner" data-appearance="collage-centered" data-show-button="never" data-show-overlay="never" data-element="main"><a href="/bestsellers?product_list_limit=36" target="" data-link-type="default" title="Summer of Learning. 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