function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bian, Xun & Zhang, Qianwen & Li, Shan', 2],
    ['Gorochov, A. V.', 6],
    ['He, Zhu-Qing & Wang, Han-Qiang & Liu, Yun-Feng & Tian, Di', 2],
    ['Hollier, John', 2],
    ['Ingrisch, Sigfrid', 3],
    ['Kumar, Hirdesh & Kushwaha, Sandeep & Chand, D. Suresh', 1],
    ['Liu, Jing & Luo, Haiyu & Lu, Xiangyi & Bian, Xun', 3],
    ['Tan, Ming Kai & Ingrisch, Sigfrid', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);