CINXE.COM

<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="390"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "academic.oup.com",cType: 'managed',cRay: '91e9ea3ce9143dc8',cH: 'AL5L9uXO12zNRYk0tEjQ9VU_4Ie8UDVTpTZJ2TIiwoY-1741684187-1.2.1.1-hm6Ym4uhc8mlMy8P_.6pdKIlg57eT6zLyVv_.5GliNUt7ba_CabNEJIzMO6jWqQq',cUPMDTk: "\/search-results?q=&tax=AcademicSubjects\/AHU02130&__cf_chl_tk=ZR59mUNhDmvr2kv2iG09RHd9p4kBlZl_ABVmSmtQleE-1741684187-1.0.1.1-aTq2XThV0qfbQlJSnN5XPN8PEQF2wQLSyEwHifuJs1k",cFPWv: 'g',cITimeS: '1741684187',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/search-results?q=&tax=AcademicSubjects\/AHU02130&__cf_chl_f_tk=ZR59mUNhDmvr2kv2iG09RHd9p4kBlZl_ABVmSmtQleE-1741684187-1.0.1.1-aTq2XThV0qfbQlJSnN5XPN8PEQF2wQLSyEwHifuJs1k",md: "CqbIKulCGryTRPCUvAhF2wiJKBK4wPJpkERD0U366tA-1741684187-1.2.1.1-coy3NUFT1jF1VNCSHYxEYykm77NY6U8w5oHKHMt94esaPSD60bja8qve57X3wrFOTkcA4vYpEGoa_hc0SklhWymR6ivM.4zFWnAwuaZtPc2Xq8kpK8aJnzif9oDoZM0sFRjVYQ3LahOu9ZTvvn2YWHEiPcP5s3RrHztuPIGF.1wSZJ_3umHqkE9J6MNIXhdGNu1Ae_PGbae99Wc0b6NgS1T4HCW1TEicN3UAwHJktCwByqpJJJ_Uo09U2o05J6ADROiK2XXEQtNHLoaZufpFAEnLcubtQWjE.oj9E6xQb7jgunDozCyc_XCDG18CQ7T1Dgj8KuS51m4h8g.gccRSGXDkddq_2Pt4y.EraunKH4hwCRmYh07bf6OfFd.RwQXBImZM0nWE8b2xKa3uZWvb90f.EgXinQ0MI8bAmI7S0WJoIqPyABlwxS70pua9y5dtTaesj7BNBUZ0QfLlDbAm3Dqf70WatKUOAC4L.58GwzbaBJxdO7uFOr.bLYd5KEAG3bs.5JRkrHeaOhVkLMMgZRZeAaqKGOFEsJ_t6texoJovv3RNvWw3zqb.ZyXvifbRAxabc0VuZgXtCAWZfXburmORQa6H1d3OR1aClY46ek0gcUNiXt4j1K0zVRqtA99CD68QoHWkZHYnaRWh_KYof58y29rjXrD3gzIB_cGtRXY6ybVMo3EioooKI3cU2gxvNTtctJG9N6Mzq0YokZ9HODigCaLYe2X6HZZAfYkpuP5FqbxAhrI0djysV006MktRIinVM0j7Yv1G.XhmxCJ5PKGuR1fRuJmlFRNTLeI3LZ7d5Ax2oWktyavTodDrfhahmDdCM_6K.m6eF0.gTlOSvPOzJdoYH6z217qZZ862FWZCcr.AJJvFJCy4rSbF.BmPyX45gGVtCS_meTa14P7nflKoIGLbkE2bXr1v5Iymc_ZbEjMOvQvY0N2H.hVI4BWIunB3D0B4NoklboAMZ5nSY6eZthJb0WCwbiebR.pKxc4F07dkgjwdVioCfeE6NM69QZDY.G4_19w1O3fEd.2g1.LEHFPNE2S9Pl1UTkqWdh0PYw3osgEcKOX68adKOg9Eopk0rkRI_lMSJsPyoXMHZNAH6EqUiyXBk3Hnfj.isK.LkR0DdMiL4IYVWCtxqcxEFLQWpvzC0W051lRWyifgqzr6Q9hPkB1pDA6XIXjhcWVMqwejjS2SDBPKO81QGLrVwsU9xMB0bVm0ehP6e_5CqRnlc2yH_NfC9daR5HQnIzQAh4B1MNQw.nUUA0JBm1OzwI0iRv6.yHWsv21yW16.nnNK_N8JIkPL.HA_c2o2MB9_6uOXtKRqDuk24KtalYs1",mdrd: "6vumZoTThvqSVUoMfWi4sM76Dbp6XiAntfwrbmX6dDE-1741684187-1.2.1.1-hVVJSovTbzxHGZXZL9K.sxS5efTSarQKCqZtcNEY7RL31NiaEOOaV9N0HCL.YdrioOpkxRDQwnzhFVahKh2RHF97GUeazkH4Ds5ORHHoAKkAqecWXUYJrJSVtpEqnp05JyWxr87FBCIflLc45x1Ue1.eMnJEsxu4q6uRpUYNBLrF_91CTPoMB7se2Yc7xUR2neN6xstCPWvue9EFZsvBIOMw7H3w.x_RJGRVV0Bnq.b3C3ZiYjTyj_kBP7DxP8OJQJnMQNR3L9Hu9MtCMSOwePJUBNEUDMkfTvUqPSonKVi.vnAXK1QpO0x.yO9ggY6lUMvQeTzq6oBw82uWTacqXITep3jlLCkUB5VhWPBuBZCoAgobVWEt8pSm8MfAiGej.TGdOLNMkLj4_GDF2qjo_d2Xx1g3AX0s9iNVC5t3ZwJmWHgi2HhnH0SmZSXEPXE8jdEeGey3t823ADa2p9228CaNOiRSCmoEhcT0fjNicG6YbTBVbpuyTdcOs_swdUqac6d3ZPmPg7IjyjNarejUYbFZeposXA61JadKQ5GJbWLkk3G6JYqKfDj6gaIg9A7Zg5UCjHuyffXK5dLPgt0UW5defnxZde2ACzsNVQR8Iomazhpig1t8b5kwSpH4V0toj7D5ZH71gU0lyPGPZ0X8dpfmEbk0.j6b5Hxjf9a_rLhLKOfg.RG0hHpNCHK3EfmsUayHK4sGosqMK420m_WOKTkweeoWpolJ3RVgNau4S5neoytYl7ascHYT6pvoMyGnvZ2WFEE7mMINWvGuCn7wGFYc5tdPDNPHTaJyr39agyJERjMsbffYjn.qR_4jNPWbRrB52tXZ6jrwJDwvdZg0LrOV0_Q3NiGxrX3BQ6tuFUEfhgz2qy..rcYRfqsISiKcohIT61Yu6TV4kp0YDt2rVC4Y.6hIIEXxes0eriyC73LmYqKSqoOUUVdp5iCDTq0U7tnw3KeOEuuo7uVRXosPagDSxC8c55ycyNdsUHmN_XVqejyN03QpqmTAPvsBKP364WvW10KoARToTd4ax6HxehHqf7SyO5QmEtyS3QFarU8tQ2NPDacCJVkZ2WcQlgYSCiaTDZZkWcFbHrFno.a.W3ENq4zIJVYDWrC4mTxP_Nh1niPlORK1yqxUog_98undebBCENUpfYZSB5BrNiU4CzcO907gXY5GxeBGFOBuLgwAm8OsAC_Ru3aCyg0Oa_zdKuB.lI5jJq0S8C2Tsxn0Lh6GC8ynrupI56kURyrCeC4KvUKVeTQZKtqr2ae.kb.IKDPdbGAI3TxeCW75Aoe0oUHRz7fqua5hkDsjPD_pupqSlWo.rgNbspQRNnjUqi.S_zD91MOA6v4IbbE4pTMt1xPf4.auU3BMLuZQ7vy5VIp.92HRLRoT1Ri_ctndA4tFXL7BdljNpYwRa0kx.Nhnqf6LEcmpi8v6cRGOqAez4dAf4KuXpglI3qjtK45vCWSSx8LYpdJS1BafrmkjEjv0Yp9PPrpE016e9xb8qlDpQdDJJYFZIG2Mjehajqj4NXMGXVKXlMnWr8ulKnj.YniVIniFsEJyY9DogPyFZBUVYRk3ljF5zIUykN4V9zRChyhl9cVtZG5irI_s7OBqcfORhzbh1nPctTlpMB1KDrhPATeXYdcOizQd_S9wSLhw1G.6ivD68y3lFEGFo9vnGy6mm95M_lONHo4Rd9D13JjwbLaU4OKo9XU2L0BFzXBGflS_snV.IMTw4Dt4B14z6ph8sVEbnuGrz3KtDEV32nvOuUPMVs6CRmavA0sL2u6M_h52pnZCDAFmrngD8n_410O9UMkDlcnol1NV.gpkf_MC0XUU_3PctZ6DKuaLgny7Qfy69fyaMzZfraVVSadriTkR_dNO2vNl2.QuqB.xXGXrnJbkxm2QnvpLu91L9tPwfe5B.cwLDYjAT0Kc_GfjN.xakiMzMfyqkawwkFMgx15SaU4v4aU9zBeH1MXUdQujmb7g"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91e9ea3ce9143dc8';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/search-results?q=&tax=AcademicSubjects\/AHU02130&__cf_chl_rt_tk=ZR59mUNhDmvr2kv2iG09RHd9p4kBlZl_ABVmSmtQleE-1741684187-1.0.1.1-aTq2XThV0qfbQlJSnN5XPN8PEQF2wQLSyEwHifuJs1k" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>