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: "cp.neurology.org",cType: 'managed',cRay: '8e952c5bac5c9c8d',cH: 'daacovktZf4AiG1Ly2UXhyx58tfnf_Ko2K5vYGZDxpw-1732742542-1.2.1.1-RNgA3EWaoC6fsp.9sYVfYHcl8iVl98A2qMR1OrfBHLc.maeUflFtjrbfrw1fhqu4',cUPMDTk: "\/?__cf_chl_tk=Pcv3bK2uKhMuNo8St7HILKeRrTBDrO48HukXjSlb2uM-1732742542-1.0.1.1-OCE6Nt7c9JNOKuCib2mLlKgRGfugeDAuetNZv5dMDTc",cFPWv: 'b',cITimeS: '1732742542',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/?__cf_chl_f_tk=Pcv3bK2uKhMuNo8St7HILKeRrTBDrO48HukXjSlb2uM-1732742542-1.0.1.1-OCE6Nt7c9JNOKuCib2mLlKgRGfugeDAuetNZv5dMDTc",md: "o081vLxpu_T1SdTiUiiEaE5zXuXqEBKr_izbko.3dDI-1732742542-1.2.1.1-7Dq5fDPpaSzvkYTbleF9ALmiZPviQc6c7BjJN2RhtbMyFnxP7.oybBM7H29v8zcwcLA3osAEYRL2riNs1Y6Jaj6nlZr_KLk5G.uDHOgdobOH5svFu.ac2VigXDqH6l9WG9Ur2hfkO0woOcVQqGDBBz9bpl2efn_qgjjfeTSfmtCcEpyewt5N45Omk4RYFJat0D24A4A5NyoLcJGr.Xk3nNWR0KkV.txsN9122LfR_EdqoNmLzK19mh9teSen1Gw2txCdGxnkmPC8bCir3Nu8s1NzrsmhE2WKVOTe.wHU4.G7uhyDe91Uy86VmDUxfy4qyu.kTtVGzqD4RFWnNyPiAWHfwqbemL960IVS7_advBJC0YFfynE3K_xcAaf0h0HU0I_9K2H7xoYrzNzc3ZaVVVIOrseojCe04rg3QvcqNiCRy0509kLz5aYTbtr1EsSwtJj8QRM7LAhA4fGJ4di8wNgn352YW.nT6Q0XEn9U6O_X0gUJGhGPjDn9zC9uqHYj5JwlOdLWnk_1hO9eVoZIX.rfAZUKgLKM.aNhq3WMlMhE8gkiIXFt4qxK6JAuF8dbZAAfG6ZnJu72gmXlNa2qTzJXTJTYTNPX6j_IqxZqpur_bT5XwM4azS9HF09kNR_p34pXxFoGSUZLfCEyTceyNhd0YsnuSvzLsiYkTSJhFcIHwYNDQks5ezfCY8sYwyU8BBwptMn3ITmHrNeEx6PLBEFmCFhB3JsvSRcSgEioCiGtsE_HRi1E2CoKuRJxgk3jMDM.ztI65Pmtk4NJ0LCYCMVKrHY4OhJy4RUyXSDDx_mfx.4buIXCz2qLBXryicuZYm4cxC7z2lwXUNBJWMk6mPBjBeI26JYEvluiitt832bh6oHvIMmb36Kjt0nQIWLkzP7N6dBHcZhlNHt0cJSNVK._wF_l0xEs9Sx5E5nG5eS8dQBH7IKmCQh3oHSN4NTLgcyz8y60aMQCnpvkUHRFIvYnR2kc3VPgu.L0i2qyDLx3ZawxxR99QI0B_eCAuSYj6M4fKY7od.BbRzz2PzySZe.gL7g8pPkUOutBPfzdd1K.NZ1PQ5zm3XNpNz5TQm9iQRfmPL6C3Favs7O7nZUP6oPxEnvj8BC2vJ8v2JuUW0d9iIrapLmHJZIRYrAGSj0RUbX0A4mVPXvng4ANP03e0mxvesZ6Q_jY0lMozv4jok1ycpgNRgchwhzlvQE2CvttZ2pmI5RcsR_IPHy.2kZVnSZ457nnU3NT1jbp5L7bP.J0RAw5xM6zXgDbO8yC4twXK3Ta0Z7SCVXQwU8wng80LJCHlInNpXOHtR_me6DOoUtsv5rJz46YhSDwROGvz2GXLofbaoqtyQU4kI7eiDWX3ieD0VGWiec1_TuoWor8vb3iTow3vsTCjOyVB3Ju8ZzrHdViM_e5a1eJm3OfepeacEEBiqx8QW1dM_qEYgyT87FptIxpdTvGmESBIF3bN_B59KgcolKQvFPh5c_guHPD67.n1l9I.4qayzcCq.5jEtwNTfMKL3Oi5Q5Bnv7w3Vl8T8CZgW0PDsJc9aJ.Z.RRqmC.whauynFq7kflKO0MDc3Bw36W.J4IDForaDyQ_iDcZo_CVYiRisbf7PXVu2wxMCGqKVHH95yEQZ3KN68qHSDweAlBt3U43K60WcbAAH6VrY70Vn_cmKexSe7tDlp1tjXpB1dxTdkR3wHDfQMLO0hWe8cgIY4JaGtxyFeTbNLVNBezeELDU9DjsuAA4IiXVhVt_GDZE6Iq3xeSSKZt4mdO0PGEuH0PFneJTZxR5AwXZV0pLd0FnSz60PQRdBWDsZb6o.VT1jk3paPUcDgJQWkQzE8nresvhX_wCnTMt_rx.A5n78RcN4KPuf_Rg4zDtKtNFWEMlb3h1FxCMUG3OMT1_ZqIjdY4KRjyPL2CzWKEGqUsoedVvaK84xPG8BLcByoyiOjccfGsDKjNgGM8l03SlYgfcGknLoLJEJ5smeAunvj.8MkUh3R_xJIv6pMKMoLqYrvX1xIYMzRjVcvTOvoQNCRxRo65VXLTjTcniBMyWyY7.cQpsdjGwh_RoY.Cwz.pYJUSh4IWUmCY55PmHanH0wOsbS3HGiW9GaR_aIbtxq2c6G3LSiDiTc7STdlxbGrQlQJGWNdYJNRibie7ijV5zCkgqhgL6xX6hAhBRLK3w2L95kX5d._wZPRMhiJTFf8fjz_vXxBooKDD6n2X.ZlvAZdpTCKXYSQUTOO4ARfHeUPw4iYxcBw5wZ5dIuW0KDplB5h_0FIXmfGuzv4M3wVrXRoPA3o83LBtyx_Z5h9.LWLoUMRI4PgkUguv9z2aiq1eSY241ObzQTTOHrAHkVhncqqhVNa5KegO9z4lG1gXckNczmukd_VDncwJgB9p7dYRB4lcQ4jV2uZv7xlI0fCxWK.xB.i3HxipF_m2gjTpF9kvbsNGMrlyDuPEO1jwpjxF.nRZ2ZZmQXifRuo5hsNEgmcvwk9yejDg4DpdAm4mm9ppQUJdEzVf.LUZAa6zO4.9GyiDdW57f0hq1breLQGwCF.TSlLlPxqZI8hJJ.A1aUlYl3F.6ojjtCtu6tmCJTTQKAipw7RXJETqSYY.LqOWgL0jsRJ2p6dGpfXgtemc3wNnwlP3vvQQfwX3MpxMUpPEKNYY314CBOZqr1boVmJmR8sKHAxotyM._fRf9llbHGwcCrX1FQQNIWvCoU6LzZejw4KNh.HCJ.3K5i1Gwm7JU4ZS9eV.U0142IAXOFdSLB3LMmMY6p7JCo.QuJJRdJ5hytcdvGD1LcQb30_IqEjRywvTlMwNqghUI.GM.E7QD5kFAXbDcc1SKr5hmQv5NGDeP0sLlhaD8hAcCZmqWTGbbv9WQK1qMeLNCIns7WsxT0cIqhvoa3xfNpMyGc1oKg",mdrd: "wPbi_8rjZrHeyCi9dfHaPhQ0jcfyU18xCl2xVZOrQmQ-1732742542-1.2.1.1-medhqevgsD_by5oWWCNVdMmKFeIhoS3Ci3CnLhbwBRL0xhuoZacafKaYCE6SJU3Q11tLXzwY0dSa8g.._3NO7HWuj4ZSbtma5Dv6N4rS5iJDFuElTePQGfyc8kKHvPyZV.FwK62PNc7E97up8HiUh9_BT3wcYK5V4BbWFuYeaR2TnbZ1iIXK5CSIDmNSWzUBDx.qIE5okpfPCMHk4TIv6Rmyx4q6W7Fx8LsTit2_GeBG3n43fnq2FFgAsD6B6xhCAS3JEANdt7sYdCDs_ly97vKD0aiXF0VZXYT8bKRg2ZctJxFiLtL0v5Vu8Bt7ybVT0FnfKdGzYEqaKZWmUoJ4_i9x2Hl9I29hu7dWnWALmNAu1y4XZJD8LDJcVzCvYxoTbdnsUYrMij.QMHK_BSfi9bdTOzGLPL6s9lL0KDeCrPvi_y_fnio4UV9oZEqmkBGg_aiK4f3OI.7A7xdfADLei_OabhzCAbXSr4imYmDmlJAqMNVzGqoEwEOMuniWy.K8gcI.P.i9z1u..GajOU5v5yj7NMvmk0CIwne3Hpsj_O.iZlv5.pbRrMzpD3SSnmTLokGx8GjZP1BJIeziadHtS.iYGZBGFT7lfEUxc_ti1tHdOj.lde8T_cnwcKqsintBeTqQtdEwUhvplFz.AON7Btf2WDv0.kYPKS_U2Cgaby47WcziXWmBH4WNlOUm1AqSWQrbQFnJAz34OJe24nwhHA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=8e952c5bac5c9c8d';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, "\/?__cf_chl_rt_tk=Pcv3bK2uKhMuNo8St7HILKeRrTBDrO48HukXjSlb2uM-1732742542-1.0.1.1-OCE6Nt7c9JNOKuCib2mLlKgRGfugeDAuetNZv5dMDTc" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>