CINXE.COM

Just a moment...

<!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: "journals.sagepub.com",cType: 'managed',cRay: '913428a18cb98342',cH: 'eYUz.NdbPQqIFxw_RZeqp8Bj_Nyd10r7Jgx6ILt2ZGA-1739778334-1.2.1.1-zhlr1wOD92vBhcXg.o6Aub1ZMlzFee8qgcd3zT9LAaTzZEAGEqbLBTZMHsvcrxQh',cUPMDTk: "\/doi\/10.1177\/1534734605275733?__cf_chl_tk=gA.ClXBKCc7sZFKO194vhMn7dP1yo2ZsxDZ5F2O.cSU-1739778334-1.0.1.1-42nTbg29euTK0ru6hd.sGPc9EoNTnSk4dAgeZA5vIW8",cFPWv: 'b',cITimeS: '1739778334',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/doi\/10.1177\/1534734605275733?__cf_chl_f_tk=gA.ClXBKCc7sZFKO194vhMn7dP1yo2ZsxDZ5F2O.cSU-1739778334-1.0.1.1-42nTbg29euTK0ru6hd.sGPc9EoNTnSk4dAgeZA5vIW8",md: "L2dzmV0Ewc7uoKeLDAPffoSjnDwAWlWPD6WtxTwaizk-1739778334-1.2.1.1-6nIXYKbz1HvDewIQ32oCUhQrtV5muuthyHBvjSsIJdwc2W6BvVIhrzZYvjrfmrXvx3pugrPmjm8ghWubHs_4zI3rGPqAZP6qr0OSBavTjD5p2N4AA6YSdWXShdu6DTD6ng7hy5q51bj8bVLBE2lASiRYfmB803iXpymS5LqoxMDpdYvPuaiu1QbyLO4OhzdOj3QXj9gbPN6L22h_KU03.BDLFcX3xE6X2xoGfu1aFhqFUA6qV7Sec.eVp6T.sG6J9VzrSgNHblofxedVHrr4jasy47EY8NTcnxc14x8lQcvrxZR44whm3sQ.UIY9x99ce6V1IxwNCEHktI2KCSGhYNL12xIS8nNTokok3oYsnkBiIbHBvd7NH_pS6iITg_Tfl6uac2l8YYXiDkzSBa12yDk0H2SUxNttwce5Gt92fszEi5t0sFtQsckjEl1HkkKn2PNRVp0DCLHUJ.0bjxe30vNFxw1suNI6xAjot2DOf6DNwGHORHPfa68fxaAcXKm_U3c_2jiP3PwlsaSrhyiUmB96hUSg7EbHjquarCuWo3K96oObL7Ms00kfQABvVCdoSGKd8L7SpIm2MYTIKtopDl4n6UAe41A6OOvjb2dDcLIK1z4GUWQdAGX06DtF.ksIldFgbjeElRBhDPkl3wUZRVfKk.jmKVsUBVrqFkgvUbyhrFYWGKzKtdOIu4QwgQY0QY71ZlYNjs0nr7ayc6wWtH8mUPgDG9wR6hnmuIaw3dFzW6AZr_47x4NWgxGG80m9zWHv2xVyKl0zJTqqJwMXqdPSQKmykxzs.RMnuWiNzce2uK78PlY96hg0FXm58xQw2w7zRAiF2lUV1Zv42DR8vWecGx92HNotUjEoyfiQxhA2lNW0Oblaav4OcEzhueCBKdVk5ld1Zmim1AqHTdoVxMcvLds8Sv0Fu8zv9aXqbEMlyZbmjig9TmYRBZSopzHVsbL1UtJTl7bbsoAWqDKhhqHR_hKY7LV3y_h8WRfjYnvlT0PQv7BA1YGzXb1w81M9rx_9gWej3bHVM32DzQ7xjktnX8yt1MvZjkBMvPj9mzM9jz5Cm1SOFoTBp98HyzI5uvEUmP45xV1sDiZsMem6S._sIaL.c7LPcFxXzLzb9y2KwkztFF7l4AiKZ3kLAEQ4MWHSsSkg2QvDV9tCJW6uGXNPEEX.u2Ac.vukuWq1YGApcyjwGJrZIWTas_je9s4L9nDuAwJTJGLIJXtbbAFLfqtzsfM_DkU7Yvag3aUbUVEP4F4FiuNbCGaqzKdRi8mUtU92gMLODJHYcT4_hBrzFygUUt_OaboEA.bDgPJacXAP5FeCKhwkOFvU1.whC5SkW_P9cnNnCu1wZuSwrmkgC6JMA4_7dxcyj79iGGosYWSn.cBscKv3Kiaa_HB4ONiegyz908YZDVHBRwSYSChZXC7gQ5Q5XRHIlN98qdrIHzQzLvaeP___kXFLQADWwOdJYFBSnHLF7SXecN.RfbB4svLti05jS8JMICY5fEqH0Vnosi_7nrhPmdYVMRmdAEzne0Y2D_XstqPI_x5VwGrruh3eQfZHML5A_kBZxas1LCXdCowpLSwIdWaspy4MI3JKSGIGXcP1U3xtYpKddBtmvKzw23UjiIg46h7b9PH19wW8yZhl_5H4Q6Kb1yF8r6YqwSLo2uSNhebeRbAO7XL.iV7IHP.yXf2_ZnQPOTvyNhoDWk0hgvemVOHfVG_4RDuubQWfHbGQAy0yUTW3wVj9wMujYiCIhOH_ymrjhZ9WcSoMZHmrQi3ODBxt8A782_ifXJWrWm_O0Ja67roY5ClWc9r1Jn5pGy_bbNc.iJUZ64f.8Hc_AI.Tm3kYmzVnOXvO7a65Xl.J2BeRujxuQ9YviTIDMKpXs8qNmn_uKxZuNev_wQD2LH5NvqU2n.pmH3OeSFnpuXFK.sTseLnQ63GEJzIS27ozrHG3vJTAvNjZlfHxnB06BhsXNZwKeFBkMYT0vcfyjlnM1agomWxYezRkqqvA.ZUARWYp26Pah_fR8t_eFdQk8eDl7MkXhM7mo_KXg09ri.4B4PNwJJJ3T5yn5YUuibmCm9RFrgQ2QJ2N.ZN3xPfdfl3P3HqFQc8uyA_Kav9rYqOO71gZX9ktg7dG8xpOaXpG1ldf812pRgAHlf5_vLg1rxUZ.iDdthj4EW3XnU9fGx7O8S9YFEzG7vGdKoeFnWrw0nghZDAvtltAXw.hJ7O_7WyQ8a59Ak0WJAe_8z1JB9hg7UsYztyOvrb0gtyStLpc69Lg1M.8_zymB5Y0jqlgBAZfgQoKND2JoUh4E1YYw126d9IbkXNdvjwv5q3GK_E6qP7pMqmnvKt3Fe6j2u6DKa9OqEpYqwHqKzlgvols64UXm1ffaEM6jr9Lcn_zcgpOeHfKiI2jAQvAMmeQdVOkkpA0m.kkrbWhhtIgYVVWGwi1OzI48IPKPRAL9nYxwSt81ca0qj1ccRyPeicNZ8X9gEzo3Xj3uxZksqy.rP.7k0dr6VXzCp.EZXX0gJ_AzVwzVpB8bWPvRXD7af7MFL.nd2JmkQUAiSMPyh5EitR5w.c5jFx9IqnecQEl3UVEN7cMf.90OC2ol9HAAkE",mdrd: "kz68ezwTrxy3jV3H4thFwpqD1jmi9JebVbGuiDPfeyc-1739778334-1.2.1.1-_x4oE.kwuz2cYBc9lk6WF8oNBaJ9_eJsASZPR8F9IFcd44UtUYy508IDoPK49HbKBT8sdpbtOiaXK9w1oIhIy1y4A3zlJ_LmIIIFCV3VID1kahMKTh2A97hfRjM4gbxVoDaVeaWrGujepSaFVfrS8l3K_2JwAYTSpxMzu7huCG73JWCzxHJLuMxp0rebQ6cvX7c5rP3ITBLXVj_XxMHfNPVzvNdZoGm4e7B3vN_ilvppzCn.2F25MyqU4paezQdZrp5QdpvFY6cboTNOaondALQNeAYQ0wQqSml6gxdPaFZPytzKU7VRHo9mtuWrYR9xWF.b7Ooz9xG4UTZbVkUauycptFzvX4CdvbKXCk0mDh2DVj2ni2_8593kp2DlwJ9CtpDNpL2uIoVwhQVklJPD2WM1vfoXhfdzXoFQ3Q.FgMidrm76FleLqScV.m0THaBRM0Hn8xaqi0t_4qQm3JgwFlxIKv7pBW50sWMRmBhCZC0FdN1pvdo7wy8Xz5WZKgjyrg9s1SsyTE6Qucih9k23M9XLBEsowuFhEtAwNsBOxMt3fYsMObvE_ug.YFpv2eeo3HQ4kpJjd1Q9Cx1ke6rWb230JUCALHj9pB_zdbdg72yrUZub8f0Vnr.Cj.qjaiftHmFPWm9vFhudFGGfJfap9hOZBeFYQ8iK23j0WzMZ0tgaqLBHpakfyUNVzOjwJjutmY6Uyqtkq5XhY3LMX7_7ReqKcrdaH2wKS2th4P3nbndcQ0YPQ1ljJg9Sc2O9nqVO1WzEV6g5R0cvCmJP9nEmF8eyIJp_iDwo8n1fVUfZrOCCpq7goiDRzwfYmSW.aEufUhtV_bGWf.FGthR0Dw0uDtVKGXoAaDc0LnB67ZHGLBnkVxujDk5dBY3ywjN4OWP7R_Xvd2y9U_hzVRpojiCUkINx5Y9ZcCd5ZcxYDfiWrwdAVR7Jjn1GvLmCV.2jGo07FERJ9w460yYknikKSwxox9LpufBenRNq1iB0eCfmXSNdCmyDUhzZ81QObERLIVaYwdMRl2uhPiGnfutrj8mpcJhi_pXzHPQ2YnsjBodQMfjENDq.3wKZRMkL.A1O67.9davvQub1Eerjn2wGsB4A8NeidKTuzCe6uF8ynnGyJV4eKf75cLWt8Np4ZeoV3TjchUx4Ey9F0m2LLKg3KtH9OKBL1XM0rp9vLMjoTZVZEPuDuKww9RD2lrCN6h4tlCtZmZLEYcuIyceD9i2gwGIcdgyGyNCCvIRid.ofdoVV8DJhpriejXRCMHIv.x0mHVyB8uhtDKNAAK7Lz5uM1JnWYxiBGUrd824_N0c7VZQAvSJmE2TGHXnVs5ve7QPcPlBZC4zzwWqZDgu1b13UfrvJi_ZkBZQpm0uXua54vSH.JGeH3ccJAQ67p4kmFhZ5kAXYP24O1KmjvSPYLsktNqmdk_vM_HHy7P1O9MbthCT1La52_fGZhLxFUHjZ4eMMdHgeaQQXIcvtn0cPcqozmNjASj2pgr.Y6b8MHJ2CHVJKjY6lPMlz3gf_bmdc2nVs81FfFvR7AmoYuukS_u_Sv68CSCULkC3QBVcIjOaEK7vpdxBUdeyoa_CGk2xQN0_VBrDhAHvxbjmE.ok6qzGFMmUHwbmNB60f0W.ut9ForQ0LSg0m14RcWQTpwKPFI360RVE8y_nJZfRpL4LgFaxgIjYzzXz6qZwsliHMvj7DH2Hn5WPpj2gY6K2NSJTJQz.eO0k2uk8Gad.WTmA9Ecuo_Nbj7yS.9z7wcitNLMDZVTS6uqTOkedf.eHskRxCJxIZMAiqHEGFmnDbtFY8URmSdtp.uInvXEPYbOvabEZjjdVpXo9A2wo2WqI.59fq88kHNN6jKiQQuCmUv3KixxDyKSiwioVdZVP4PLb7cgV9nTiDSFt5qOOnEPwhY7jQ6QiQgws3bjlk0rmjF8ul7yhRbY.F4vepKEdGZZwdSdAHbiazzBwsVTJunocWLJBLF1UiwTMjFST0yLsU0EgV2po3Z5d.Ew"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=913428a18cb98342';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, "\/doi\/10.1177\/1534734605275733?__cf_chl_rt_tk=gA.ClXBKCc7sZFKO194vhMn7dP1yo2ZsxDZ5F2O.cSU-1739778334-1.0.1.1-42nTbg29euTK0ru6hd.sGPc9EoNTnSk4dAgeZA5vIW8" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>