function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aistleitner, E.', 1],
    ['Bonelli, Simona & Barbero, Francesca & Casacci, Luca Pietro', 1],
    ['Cao, Chenglong & Huang, Siyao & Xu, Yongqiang & Wu, Haomin', 1],
    ['Chiba, Hideyuki & Tsukiyama, Hiroshi & Liang, Jia-Yuan', 1],
    ['Irungbam, Jatishwor Singh & Meitei, Laishram Ricky', 3],
    ['Khudhur, Farhad A.', 1],
    ['Scudder, Samuel Hubbard', 1],
    ['Xue, G. X.', 1],
    ['Xue, Guo-Xi & Sun, Hao & Sun, Zhou & Wang, Shao-Neng', 1],
    ['Zhu, Lijuan & Hou, Yongxiang & Chiba, Hideyuki & Osada, Yohei', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);