function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amún, Cristian & Claps, Lucía E.', 1],
    ['Borchsenius, N. S.', 1],
    ['Kondo, Takumasa & Muñoz, Jazmín Adriana', 1],
    ['Mifsud, David & Mazzeo, Gaetana & Russo, Agatino', 1],
    ['Mille, Christian & Henderson, Rosa C. & Cazères, Sylvie', 5],
    ['Moghaddam, Masumeh', 2],
    ['Niu, Minmin & Cai, Bo & Wei, Jiufeng', 2],
    ['Stalažs, Arturs', 1],
    ['Suh, Soo-Jung', 3],
    ['Takagi, Sadao & De Faveri, Stefano', 1],
    ['Tian, Feng & Xing, Jichun', 5],
    ['Wei, Jiufeng & Jing, Xiaopeng & Zhang, Hufang', 2],
    ['Williams, Douglas J. & Ben-Dov, Yair', 3],
    ['Williams, Douglas J. & Miller, Douglass R.', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=32)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);