<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">@font-face{font-family:'Asap';src:url('../font/Asap-Regular-webfont.eot');src:url('../font/Asap-Regular-webfont.eot?#iefix') format('embedded-opentype'),url('../font/Asap-Regular-webfont.woff') format('woff'),url('../font/Asap-Regular-webfont.svg#AsapRegular') format('svg');font-weight:normal;font-style:normal}@font-face{font-family:'Asap';src:url('../font/Asap-Bold-webfont.eot');src:url('../font/Asap-Bold-webfont.eot?#iefix') format('embedded-opentype'),url('../font/Asap-Bold-webfont.woff') format('woff'),url('../font/Asap-Bold-webfont.svg#AsapBold') format('svg');font-weight:bold;font-style:normal}@font-face{font-family:'PTSerif';src:url('../font/PTF55F-webfont.eot');src:url('../font/PTF55F-webfont.eot?#iefix') format('embedded-opentype'),url('../font/PTF55F-webfont.woff') format('woff'),url('../font/PTF55F-webfont.svg#PTSerifRegular') format('svg');font-weight:normal;font-style:normal}@font-face{font-family:'PTSerif';src:url('../font/PTF56F-webfont.eot');src:url('../font/PTF56F-webfont.eot?#iefix') format('embedded-opentype'),url('../font/PTF56F-webfont.woff') format('woff'),url('../font/PTF56F-webfont.svg#PTSerifItalic') format('svg');font-weight:normal;font-style:italic}::selection{background:#86f23e}input::selection{background:#86f23e}html,body{height:100%}sup.xref{display:inline-block;padding:4px 6px 3px;font-family:Asap,Arial,sans-serif!important;font-size:10px;text-align:center;line-height:100%;color:#fff;background:#d9ae30;border-radius:12px;vertical-align:top;margin-top:3px}sup.xref::selection{background:#d9ae30}sup.xref.big{margin-top:0;vertical-align:middle;font-size:12px}.dropdown:hover&gt;ul.dropdown-menu{display:block}.dropdown .dropdown-menu{font-family:Asap,Arial,sans-serif}.dropdown .dropdown-menu&gt;li&gt;a{padding-top:7px;padding-bottom:7px}.tooltip{font-family:Asap,Arial,sans-serif;font-size:1em;font-weight:normal}.bIcon{min-height:25px;padding-left:30px;background-image:url(../img/glyphicons-blue.png);background-repeat:no-repeat}.bIcon.link{background-position:0 0}.bIcon.stats{background-position:0 -25px}.bIcon.author{background-position:0 -50px}.bIcon.copyright{background-position:0 -75px}.bIcon.figref{padding-left:25px;background-position:0 -102px;white-space:nowrap}.bIcon.formularef{padding-left:25px;background-position:0 -127px;white-space:nowrap}.bIcon.miniLink{padding-left:25px;background-position:0 -152px;white-space:nowrap;font-weight:bold}.yIcon{min-height:40px;padding-left:40px;background-image:url(../img/glyphicons-yellow.png);background-repeat:no-repeat}.yIcon.calendar{background-position:0 0}.yIcon.pdf{background-position:0 -40px}.yIcon.xml{background-position:0 -80px}.yIcon.refs{background-position:0 -120px}.yIcon.translate{background-position:0 -160px}.yIcon.send{background-position:0 -200px}.yIcon.social{background-position:0 -240px}.yIcon.sections{background-position:0 -280px}.yIcon.related{background-position:0 -320px}.gIcon{min-height:40px;padding-left:40px;background-image:url(../img/glyphicons-gray.png);background-repeat:no-repeat}.gIcon.calendar{background-position:0 0}.gIcon.pdf{background-position:0 -40px}.gIcon.xml{background-position:0 -80px}.gIcon.refs{background-position:0 -120px}.gIcon.translate{background-position:0 -160px}.gIcon.send{background-position:0 -200px}.gIcon.social{background-position:0 -240px}.gIcon.sections{background-position:0 -280px}.gIcon.related{background-position:0 -320px}.gIcon.soft-contrast{background-position:0 -400px}.gIcon.high-contrast{background-position:0 -440px}.gIcon.ihigh-contrast{background-position:0 -480px}.gIcon.top{background-position:0 -520px}.skin-soft-contrast{background:#f8f2e9}.skin-soft-contrast .mainHeader{background:#e0dad1}.skin-high-contrast{background:#fff}.skin-high-contrast .mainHeader{background:#eee}.skin-inversed-high-contrast{background:#000;color:#fff}.skin-inversed-high-contrast .mainHeader{background:#222;color:#fff}.skin-inversed-high-contrast .mainHeader h1{color:#fff}.skin-inversed-high-contrast .rMenu div{color:#ccc}.skin-inversed-high-contrast .rMenu a.yIcon{color:#fff}.skin-inversed-high-contrast .rMenu a.yIcon:hover{background-color:#333}.skin-inversed-high-contrast .infoContainer{color:#000}.skin-inversed-high-contrast section article .refList{color:#ccc}.skin-inversed-high-contrast section article .refList.full{color:#333}.mainHeader{min-height:57px;font-family:Asap,Arial,sans-serif;color:#656565;line-height:100%}.mainHeader .row{position:relative}.mainHeader h2{margin:0;font-size:.5em;text-indent:-5000px;height:95px;background:#fff url(../img/logo-plainScielo.png) center 0 no-repeat;position:absolute;left:20px}.mainHeader h1{line-height:100%;color:#000;font-style:italic;font-weight:normal;font-size:1.1em;margin-top:38px}.mainHeader .epub-issn{margin-top:38px;font-size:.8em}.publish-version{color:#656565;line-height:100%;padding:10px 0;font-family:Asap,Arial,sans-serif;font-size:.8em}.publish-version .doi-url{font-size:.9em}.sec{margin:24px 0 0 0}.sec .container{padding-bottom:80px}.sec .header h2{font-family:Asap,Arial,sans-serif;font-weight:normal;font-size:1.2em;color:#656565;line-height:100%}.sec .header h1{font-size:2em;font-weight:normal;line-height:130%;margin:0 0 5px 0}.sec .header .link-group{line-height:100%;font-size:.8em;font-family:Asap,Arial,sans-serif;font-weight:bold;position:relative}.sec .header .link-group input.trans{font-family:Asap,Arial,sans-serif;font-weight:bold;color:#1e87a8;background-color:transparent;border:0;box-shadow:none;padding:0 0 0 30px;height:auto;cursor:pointer}.sec .header .link-group a.bIcon{box-sizing:border-box;-moz-box-sizing:border-box;display:inline-block;padding-top:5px}.sec .header .link-group a.bIcon:hover{color:#1e87a8;text-decoration:none}.sec .header .infoContainer{background:#fff;position:absolute;left:0;padding:10px;margin-top:7px;border-radius:3px;font-weight:normal;-webkit-box-shadow:0 0 10px 0 rgba(0,0,0,0.2);box-shadow:0 0 10px 0 rgba(0,0,0,0.2)}.sec .header .infoContainer:before{position:absolute;display:inline-block;content:'';top:-7px;border-right:7px solid transparent;border-bottom:7px solid #fff;border-left:7px solid transparent}.sec .header .infoContainer *{line-height:110%}.sec .header .infoContainer ul{margin:10px;padding:0 0 0 30px}.sec .header .infoContainer li{list-style:none;text-indent:-30px;margin-bottom:14px}.sec .header .infoContainer sup{width:10px;margin:0 5px 0 0;text-indent:0}.sec .header .infoContainer .author-notes{background:url(../img/dashline.png) top left repeat-x;padding:10px}.sec .header .author-affiliation{z-index:1000}.sec .header .author-affiliation:before{left:10%}.sec .header .permissions:before{left:47%}.sec .header .contrib-group{margin:20px 0 10px;font-family:Asap,Arial,sans-serif;font-size:1.2em}.sec .header .contrib-group span{margin:0 10px 0 0;white-space:nowrap}.sec .rMenu{margin:0;padding:0;font-family:Asap,Arial,sans-serif;font-size:.9em}.sec .rMenu *{line-height:120%}.sec .rMenu li{list-style:none;background:url(../img/dashline.png) bottom left repeat-x;padding-bottom:1px}.sec .rMenu div{background:url(../img/dashline.png) top left repeat-x;padding:7px 10px;color:#656565;font-size:.8em}.sec .rMenu div.link-list{line-height:180%;font-size:1em;font-weight:bold}.sec .rMenu p{margin:0;padding:5px 0}.sec .rMenu a.yIcon{display:inline-block;position:relative;box-sizing:border-box;-moz-box-sizing:border-box;width:100%;height:35px;padding-top:12px;color:#000}.sec .rMenu a.yIcon:hover{background-color:#fefdfc;text-decoration:none}.sec .rMenu a.yIcon span{position:absolute;top:8px;right:7px;display:block;padding:2px 6px;border-radius:3px;border:1px solid #b2ada6;background:#fff;color:#656565;text-align:center;width:10px;font-weight:bold}.sec .article{line-height:150%;margin:60px 0 0}.sec .article h1{font-family:Asap,Arial,sans-serif;font-weight:bold;font-size:1.5em;line-height:120%}.sec .article h2{font-family:Asap,Arial,sans-serif;font-weight:bold;font-size:1.2em;line-height:120%}.sec .article h3{font-family:Asap,Arial,sans-serif;font-weight:normal;font-size:1em;line-height:120%}.sec .article .kwd-group{font-family:Asap,Arial,sans-serif;font-size:.8em;line-height:130%}.sec .article .paragraph{position:relative;padding:0 0 20px 0}.sec .article .paragraph span.formula{display:block;margin:20px 0;padding:7px;text-align:center;font-size:2em;background:#fff;border-radius:3px}.sec .article .paragraph span.formula img{max-width:95%}.sec .article .refList{margin:0;padding:.8em;font-family:Asap,Arial,sans-serif;font-size:.8em;color:#333;margin-top:-10px}.sec .article .refList *{line-height:130%}.sec .article .refList.outer{padding-bottom:10px;overflow:hidden;-webkit-box-shadow:inset 0 -7px 7px -7px rgba(0,0,0,0.2);box-shadow:inset 0 -7px 7px -7px rgba(0,0,0,0.2)}.sec .article .refList.full{position:absolute;height:auto!important;overflow:inherit!important;background:#fff;z-index:1010;-webkit-box-shadow:0 0 10px 0 rgba(0,0,0,0.2);box-shadow:0 0 10px 0 rgba(0,0,0,0.2)}.sec .article .refList li{list-style:none;background:url(../img/dashline.png) bottom left repeat-x;padding:14px 7px}.sec .article .refList li .opened{display:none}.sec .article .refList li.highlight{background-color:#ecd79f}.sec .article .refList li.highlight .closed{display:none}.sec .article .refList li strong{display:block;margin:0 0 10px}.sec .article .refList sup{border-radius:30px}.sec .article .refList .pull-right{width:88%}.sec .article .refList .source{font-family:PtSerif,Georgia,Times,serif}.sec .article .refList .closed .source{margin-top:3px;text-align:right}.sec .article .refList .opened .source{margin-top:10px}.sec .ref-list .refList{font-size:.9em}.sec .ref-list .refList .pull-right{width:95%}.sec .fig,.sec .table{font-family:Asap,Arial,sans-serif;font-size:.8em;margin-top:10px;margin-bottom:40px;position:relative}.sec .fig *,.sec .table *{line-height:130%}.sec .fig strong,.sec .table strong{color:#1e87a8}.sec .fig .thumb,.sec .table .thumb{box-sizing:border-box;-moz-box-sizing:border-box;border:4px solid #c6c2ba;height:140px;background-size:100% 100%;text-indent:-5000px;background-color:#fff;cursor:pointer;border-radius:3px}.sec .fig .thumb img,.sec .table .thumb img{width:100%}.sec .fig .preview,.sec .table .preview{position:absolute;border-radius:3px;border:4px solid #c6c2ba;background-color:#fff;top:0;right:0;z-index:1030}.sec .fig .preview img,.sec .table .preview img{width:100%}.sec .table-notes a{display:block;padding:5px 0}.floatMenu{height:50px;position:fixed;width:100%;top:-62px;border-top:1px solid #e5e2dd;border-bottom:1px solid #8b8883;-webkit-box-shadow:0 0 10px 0 rgba(0,0,0,0.2);box-shadow:0 0 10px 0 rgba(0,0,0,0.2);background:url(../img/floatMenu-bg.png) bottom left repeat-x;z-index:1030}.floatMenu div{height:50px;box-sizing:border-box;-moz-box-sizing:border-box}.floatMenu .drop-container{display:inline-block}.floatMenu .drop-container:hover .drop{display:block}.floatMenu .drop{display:none;border-radius:3px;background:#fff;margin:10px 0 0 0;padding:20px;position:absolute;list-style:none;-webkit-box-shadow:0 0 10px 0 rgba(0,0,0,0.2);box-shadow:0 0 10px 0 rgba(0,0,0,0.2);top:35px}.floatMenu .drop:before{position:absolute;display:inline-block;content:'';top:-7px;left:12px;border-right:7px solid transparent;border-bottom:7px solid #fff;border-left:7px solid transparent}.floatMenu .drop.menu{font-family:Asap,Arial,sans-serif;font-size:.8em;padding:8px;min-width:100px}.floatMenu .drop.menu li a{display:block;padding:8px 8px;border-radius:3px;color:#000}.floatMenu .drop.menu li a:hover{text-decoration:none;color:#fff;background-color:#1c809f;background-image:-moz-linear-gradient(top,#1e87a8,#1a7692);background-image:-webkit-gradient(linear,0 0,0 100%,from(#1e87a8),to(#1a7692));background-image:-webkit-linear-gradient(top,#1e87a8,#1a7692);background-image:-o-linear-gradient(top,#1e87a8,#1a7692);background-image:linear-gradient(to bottom,#1e87a8,#1a7692);background-repeat:repeat-x;filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff1e87a8',endColorstr='#ff1a7692',GradientType=0)}.floatMenu .drop.menu li a span{display:inline-block;vertical-align:middle}.floatMenu .drop li{list-style:none}.floatMenu .drop *{line-height:130%}.floatMenu .logo{background:url(../img/logo-plainScielo.png) center -128px no-repeat;text-indent:-5000px}.floatMenu .article-data{position:relative;font-family:Asap,Arial,sans-serif;padding-top:10px}.floatMenu .article-data a.title{color:#000;width:100%;display:block;-o-text-overflow:ellipsis;text-overflow:ellipsis;overflow:hidden;white-space:nowrap;box-sizing:border-box;-moz-box-sizing:border-box;padding-right:25px;background:url(../img/glyphicons-gray.png) right -367px no-repeat}.floatMenu .article-data a.title:hover{text-decoration:none}.floatMenu .article-data .drop strong,.floatMenu .article-data .drop span{display:block;margin:0 0 7px}.floatMenu .article-data .drop strong{font-size:.9em;color:#1e87a8}.floatMenu .article-data .drop span.title{font-family:PtSerif,Georgia,Times,serif;font-size:1.1em}.floatMenu .article-data .drop span.author{font-size:.7em}.floatMenu .article-data .drop a{font-size:.8em;margin-right:10px}.floatMenu .main{display:inline-block;white-space:nowrap;margin:3px 0 0;text-indent:-5000px}.floatMenu .color-contrast .drop{margin-left:-100px}.floatMenu .color-contrast .drop:before{left:58%}#iframeModal{width:760px;margin-left:-380px}.footer{font-family:Asap,Arial,sans-serif;color:#cdc7bf;font-size:.8em}.footer *{line-height:130%}.footer p,.footer small{display:block;margin:20px 0}.footer .metaInfo{border-radius:3px;background:#e0dad1;color:#7f7a71}.footer .metaInfo .logo{background:url(../img/logo-plainScielo.png) 0 -220px no-repeat;height:50px}.addthis_button_expanded span{display:none!important}@media(min-width:768px) and (max-width:979px){.mainHeader h2{background-position:12px -100px}.floatMenu .translate,.floatMenu .social{display:none}section article .refList .pull-right{width:82%}}.oldie .article .fig .thumb{background:#fff url(../img/fig-thumb.png) center center no-repeat!important}.oldie .article .table .thumb{background:#fff url(../img/table-thumb.png) center center no-repeat!important}.oldie .refList.outer{border-bottom:5px solid #999}.oldie .refList.full{border-bottom:0}.ie7 .bIcon{min-height:20px}.ie7 .sec .rMenu .yIcon{height:25px;min-height:25px}.ie7 .sec .rMenu .yIcon span{right:50px}.ie7 .refList.full{width:300px;border:0}.ie7 .pfocus{z-index:1}.ie7 .sec .header .infoContainer{margin-top:30px} blockquote p {font-size: 1em;} table{margin: 0 auto; min-width: 95%;} .table th, .table td, .table thead{border-bottom: 1px solid #ddd; border-top: 1px solid #ddd; border-right: 1px solid #ddd; border-left: 1px solid #ddd;} .table th:last-child, .table td:last-child {border-right: 1px solid #ddd;} .table tbody tr:nth-child(odd) {background: #eee;}
</pre></body></html>