SwORsCAuDQCD+QILmD1A9kECEZgxDaEZhICIzGcIyEyOl2RkgwAAhkmC+eAm0TAAAAABJRU5ErkJggg==');
          a.append(img);
          $(this).append(a);
        }
      });

      // hide elements of author/affiliations grid that have no value
      function hide_byline_column(caption) {
        $('d-byline').find('h3:contains("' + caption + '")').parent().css('visibility', 'hidden');
      }

      // affiliations
      var have_affiliations = false;
      for (var i = 0; i<front_matter.authors.length; ++i) {
        va