r author = front_matter.authors[i];
        if (author.affiliation !== "&nbsp;") {
          have_affiliations = true;
          break;
        }
      }
      if (!have_affiliations)
        $('d-byline').find('h3:contains("Affiliations")').css('visibility', 'hidden');

      // published date
      if (!front_matter.publishedDate)
        hide_byline_column("Published");

      // document object identifier
      var doi = $('d-byline').find('h3:contains("DOI")');
      var doi_p = doi.next().empty();
   