body{font:12px "Times New Roman",Arial,Helvetica,sans-serif;}
h1 {font-size:24px; margin-top:0; padding-bottom:5px}
h2 {font-size:16px;}
h3 {font-size:14px;}
h4 {font-size:13px}
.abstract_title, .authors, .affiliations {text-align:center}
.affiliations {max-width:700px;margin:0 auto}
.authors, .affiliations {font-size:14px}
.affiliations ul{list-style:none}
.txt_section{-moz-column-count: 2;
	-moz-column-gap: 20px;
	-webkit-column-count: 2;
	-webkit-column-gap: 20px;
	column-count: 2;
	column-gap: 20px;margin-bottom:20px}
	
.txt_section img {max-width:300px}