function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Conle, Oskar V. & Hennemann, Frank H. & Valero, Pablo', 3],
    ['Cumming, Royce T. & Le Tirant, Ste ́ phane', 7],
    ['Cumming, Royce T. & Le Tirant, Ste ́ phane & Linde, Jackson B.', 12],
    ['Cumming, Royce T. & Tirant, Ste ́ phane Le', 4],
    ['Gao, Hao-Ran & Xie, Chong-Xin', 2],
    ['Heleodoro, Raphael Aquino & Rafael, José Albertino', 1],
    ['Herhold, Hollister W & Davis, Steven R & Degrey, Samuel P', 1],
    ['Ho, George Wai-Chun', 19],
    ['Perez-Gelabert, Daniel E.', 1],
    ['R. G. Beutel & S. N. Gorb', 1],
    ['Villet, Martin H.', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1],
    ['Xie, Chong-Xin & Qian 1, Jun WenYu-Han', 2],
    ['Xu, Fangling & Jiang, Yingjie & Yang, Maofa', 3],
    ['Zhang, Xin-Wen & Ren, Dong & Pang, Hong & Shih, Chung-Kun', 4],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=63)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);