function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, Ronglian & Zhang, Faqi & Chen, Shilong & Chi, Xiaofeng', 2],
    ['Guo, Shaobin & Wang, Mingdi & Xu, Wen & Zou, Fuxian', 1],
    ['Jin, Yue & Sun, Mei & Jiang, Hong & Kumar, Pankaj & Liu, Zhen', 2],
    ['Ormerod, Paul & Kurzweil, Hubert & Watthana, Santi', 4],
    ['Pignal, Marc & Laudereau, Christian & Laudereau, Pierre-Louis', 3],
    ['Schlechter, Fridrich Richard Rudolf', 1],
    ['Wu, Yan-Bin & Han, Yu & He, Xu-Hui & Chen, Hui-Ling', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);