function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bourguignon, Thomas & Roisin, Yves', 6],
    ['Chen, Guan-Yu & Ke, Yun-Ling & Liang, Wei-Ren & Li, Hou-Feng', 2],
    ['Fornazier, M. J. & Martins, D. S. & Fanton, C. J.', 1],
    ['Krishna, Kumar & Grimaldi, David', 1],
    ['Krishna, Kumar & Grimaldi, David A. & Krishna, Valerie', 4],
    ['Shiraki, T.', 1],
    ['Takematsu, Yoko & Vongkaluang, Charunee', 5],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1]
  ]);
  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);