function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arslan, Naime & Timm, Tarmo & Rojo, Verónica & Vizcaíno, Antón', 1],
    ['Chen, Juanjuan & Schmelz, Rüdiger M. & Zhang, Zuxu & Xie, Zhicai', 1],
    ['Chertoprud, Mikhail V. & Palatov, Dmitry M.', 1],
    ['Christoffersen, Martin L.', 1],
    ['Dózsa-Farkas, Klára & Felföldi, Tamás & Hong, Yong', 3],
    ['Lu, Yajing & Xie, Zhicai & Zhang, Junqian', 1],
    ['Nagy, Hajnalka & Dózsa-Farkas, Klára & Felföldi, Tamás', 8],
    ['Torii, Takaaki & Akagi, Tomohiro & Uchino, Toru', 1],
    ['Šundić, Danijela & Radujković, Branko M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);