uthors[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();
    if (!front_matter.doi) {
      // if we have a cit