function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Archibald, S. Bruce & Gu, Jun-Jie & Mathewes, Rolf W.', 2],
    ['Fang, Yan & Zhang, Haichun & Wang, Bo', 2],
    ['Fang, Yan & Zhang, Haichun & Wang, Bo & Zhang, Yutao', 4],
    ['Gu, Jun-Jie & Qiao, Ge-Xia & Ren, Dong', 2],
    ['Gu, Junjie & Zhao, Yun-Yun & Ren, Dong', 4],
    ['Liu, Xianwei & Zhou, Min & Bi, Wenxuan & Tang, Liang', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);