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: "www.hindawi.com",cType: 'managed',cRay: '922c0ccecedf4aa7',cH: 'Ghx1aGDD0TiLmrd1Lm6X.KfG844NPakocyVeS3wDXHM-1742377663-1.2.1.1-aydeqVX374CW6WymKsaJPboar5ZgbPti8iA.deTXyAxEonhmItpG9SyWpHVS2u_Z',cUPMDTk: "\/journals\/aaa\/2021\/5592010\/?__cf_chl_tk=4VMvLYG9XUEgNGO_A7BDFhLFJvqfhWOIO11cxmtgAVs-1742377663-1.0.1.1-RW47sst8BD2WEFZxePEX2FssoRN5AOqNGj0X4MKG6dU",cFPWv: 'g',cITimeS: '1742377663',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/journals\/aaa\/2021\/5592010\/?__cf_chl_f_tk=4VMvLYG9XUEgNGO_A7BDFhLFJvqfhWOIO11cxmtgAVs-1742377663-1.0.1.1-RW47sst8BD2WEFZxePEX2FssoRN5AOqNGj0X4MKG6dU",md: "0wjhtGEWRsQiUYi2RKI_CJ4urnYvZnz42z3Yoceo4Pg-1742377663-1.2.1.1-HnVZ.zJuiIIrCT4XlsMTsG0a.jw5iu9hHiURXm4_2R5lCyjUq9uHjn4vOMQdHJK.voIrdL3FhUpzCsGL4uxCGi55_kLAE5pYhUzmtRqbzWDajX675HgrL.4BzqdXAhHWgdEm5nZmR48H3IUqZ4Vm5G2coFYWGZk2LJB8t7DChJAAAUz5uw7t1WM2OxW4Pr3qGW7inJYTRXKTFSpzbvKm2FzxUmwst.BCRK_kC53oFpCbJsrFD7ytRLR9ZBuhfGeeeywBog6FxjU8Eh08hLri3TpSZvNRsyRnFvoGCjxIyfURM7pjh8_urOfyOrfVaIW4LTM6_gsi25bqkdFgyPcXSz8j4y6HZrQFBmTMGeAGjwNfX9kBobu.CIof0WSTCa6NRGik__GJvHzc5ByL5ANuAGeUKA5iRjlFsZozQgI4U63iYBhXTiNcZ4Wg0IxORe3a.8nE9S9WRASVpDSIuPPAFRO1PZjrmBMg_VWYJMyjhVu88L.MJiV.7K3pSr8cCVTomRfzG2CilCRZaSVDc7kfrRhev7jy9RFyo_pyR.y36TaQ9BjV4uILRbSPywZPTKnDN8tV.BE_opnPSxX5wvmnRGVqyTEof9cTbIU7r0GduzF9xFMvXbQ9e_rF3U3PHUBXWlrGas80eAcs7LnVb.8D3sCFYmG90qyvL_p.fi_f57x5IjcGmnf.ZKcU7h0acBQHbv5.Vgwp30fOLOa6Qns9pN43tjC1FTd5DMTYVoeBD9P1YHIP7DiFTgWIF5dHQan9vWO6wjY8GU9g8uaER14c6pPEEEM89UdDU4difWkQa5DlbSa9a.a9kz5mX.IkEGe9WIXO8kv9aRTmjxQNDU4jnlMvgfoD_LizVYt1I_W23XWHxPh37QlgygaQHpdeZ3QAvYCw74YmQN9pbwayvJh1.pSvFAxemrKAhsXuTH5K0zu3cLKUF1oFO.wKcouRNB6n.satrpwgmXri7yBNGXor9bHu0M5gdOuwEWsHzbhRHZS_ZRvoDbxxsrqPaudazP_0NfUA26cg6Ecdps_swltR36mJ0H6Gyaxc9jYV2F1zx_RuiLRsITzKKPPdgV56k9hKZcEHmWLvPyA.sbRXsKP0.SMmufDY5.MYs.UjcFUpXHoadu9NHFXcbUIvc8wjBnLBZ1gI.SGRkxQxv1kKk9LY5taQc.vADHGyw10I6W_S5cTU04eqQaUG0F3QKSzqWp8MBNXS0PNotwTpUdEsea7AvBEqHTSi3MvoemyBGaXiOH3jtJyTwMV2JvODlMN5K9t3yo.arrMH2MVnszvurzqvKg",mdrd: "O1qQYRkkq8HYgfX_OkN2MOqHGuQU5CUoB18WTWkV81k-1742377663-1.2.1.1-e6lwkjMR6hmHWtiNrrc6ze_gH3XzkdDUhT2RlbsZnlMqT7P0LiNJNZ7ssjYjUxRuheupT3z9h41JTvxTRxOyv4UTJPpWO08FXS3ox5Gcs.1bHzlqfETxbZMt9qThFUgSrobOpIasy7gCmKacexK5wi0GsmSIaqmnkc6u0HfQOxGn159_tWPTYUR1Qi5LOgmZCRZridNBuLHasoHzi6JzrmzuGu5cRnFtnGiwyX7LCZlNbpNcXY_afoyCwcYYgzsBGRv0oz_1VKv3N0V4BR6i_VZB1yA7QClFdeejTPFQ_mTR4oyqwD.Fvgi1t9_ebyRz3a2gm.Vns9aZc3AvkI_GnG90RIYVp5qs.0MMg3KkgKczy1Q5T8KE3JVWru1oZzd02JQxokMsquyAgdtdUMzMZb89qEdFI1NZjX9ErciI45o51578_Ylf8lZvVMeoQ3nVOM_eN9BMH.lZwEMMYEMxz9PxDzw6IzXsLY9D5sODgBYK_iqg4gnmI1LexDEzml5aoG7z5VfGGYxmV1C5G0c3se8.DTB_iFp83Ib_OKfG01d2niMOqRc8i9MftE2XDONoDEIFFqaItjk2WmAFaEpT4_9d7agpeHlwzPVDCl9onndSCIMLWrRGmbSI..bkKyWM.neXlQ7PPVrwkWyrp.vU0E79_jz_xn0UZgF.GYH_2n8ip6q6VdouAU7zseNNRIaYe0y3lW.sjQJYmbKEuJSFTXhbXoMPYZNYU18ta7wDlhW1_y3AMQftWILv4HRe5ZnSifu3TSCgqFw0uXEI15fqnIXfbqj953BI.I9PS81mqoYEumVXmeaRM8dPE695.PpbwtqSYrP_2m1YWxqtPbYDiiVpkeAVOXGp_jX1ijq_.cRhNlKoOc0ONY8kVgzddgKwO2Hm8HDF6B6h5BQrzLu6YFNKwXgO8ppmYWEBSBSjksLbSrs2DSZAq.dF2vJGXinn7EC5Uc3tA51cvWDP4HcIdybi_D4q61rzlQvS8M8HQ6WAUNmH2ObAw0LyERQFuclbfOSSkrA_6CdMpSoJOR6puUUwS49ATO899O_D5H2nZiZ.pDaEFnC5s5ul8bI2LhnXbEDOUTwfDRd6.fvX_tIYx3LFMN88vYsiix4eSQT9p_0jMXcX8lObMClIaitLOj3FKvhe_ZTxfcZZ3i8FqtOgB3shOiu2MSypru9KzyseGhL9427HO0CHxtcO.vYi_YaP8.CioQTXKWsN7zW0ZdrwVYPqb0E0q65TgIecIj5mqFOA5_DkjInPIc6Xt.ojrVZ3GpRSV2SAtlNwGvbq5AzGP504X8X7drjN2xftSjM76dzLXfGXoRDrY6bKjibazhg1H.MDukLz7T3EMS5ctjbbW81NM_LDodmZ7jy8nQG99kvL0HiRrLJRG_Lp4ncckRETMtfSrNnAWL02ALgvGLTLUz4BGgSG9M_rio6WX8jlDrEKRVtHiJK8joEAeAnbeL.tFFX3I9cghVfUs.izcMZG8DUS0fzvD6_axdsdCqaOq0n2WwFxUhgPtnu.JHycWRQZs15kZrNklfU22xAmBtr7FyseMbYCfyG6F9fnrmruhfSNa_ewuCm1sqsTzV19UT6cubDY9atFw6OMOBtDIVo1._MESSRLCP8BMhnVoiaCRF_TTEQ0eau1R53AsaQJv1UdidvtGeygxYEk1as1AklefYAMeZDuXDiqAgzLt_7hK68cRJ1urMOJdLAyfaZ5j5dSkjSRXzF2TrCwJQnIz7Y.kTCPZWMhtZhtotWmxOCNW4DbX8eE503VO8rN._SzWz9aWqOKG0xZCXGykriVBb0AaitCNkIENEfFHywUcSJE3H4p5EgM2rbKp4dqCVADh9WfCEoCtN2U_etdEUUaMnf84DZrT5aWd8LyYyctbBqopK7gQ3UmnT33luHnR4q9XqmFsh4RKqhvESBaTucHXXlWZO6v4v1L0XQyfwTzJguACRHTV_uZDMSR.uYTcxFn.dW5f_uOa..iqWct_Z4CCwRufNkjI1q81TV90wBk2YWroiMYHgqbaV.f0Krt4yjLIt9RK0mgxrnUaMnNJ73s94twNQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=922c0ccecedf4aa7';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, "\/journals\/aaa\/2021\/5592010\/?__cf_chl_rt_tk=4VMvLYG9XUEgNGO_A7BDFhLFJvqfhWOIO11cxmtgAVs-1742377663-1.0.1.1-RW47sst8BD2WEFZxePEX2FssoRN5AOqNGj0X4MKG6dU" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>