Widget:DFP3

<script> var mapping1 = googletag.sizeMapping().

 addSize([0, 0], []).
 addSize([1050, 200], [300, 250]). // Desktop
 build();
 googletag.cmd.push(function() {
   googletag.defineSlot('/75830016/wikirefua_desktop_homepage_bottom_300x250', [300, 250], 'div-gpt-ad-1545206018071-0').defineSizeMapping(mapping1).addService(googletag.pubads());
   googletag.pubads().enableSingleRequest();
   googletag.pubads().collapseEmptyDivs();
   googletag.pubads().setTargeting('search', []).setTargeting('expertise', []).setTargeting('url', []).setTargeting('validation', []);
   googletag.enableServices();

googletag.display('div-gpt-ad-1545206018071-0');

 });

</script>