function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Desutter-Grandcolas, Laure & Anso, Jérémy & Jourdan, Hervé', 1],
    ['Gu, J. X. & Dai, L. & Huang, J. H.', 1],
    ['Hollier, John & Bruckner, Harald & Heads, Sam W.', 4],
    ['Tan, Ming Kai', 2],
    ['Tan, Ming Kai & Abdul Wahab, Rodzay bin Haji', 1],
    ['Tan, Ming Kai & Japir, Razy & Chung, Arthur Y. C.', 2],
    ['Tan, Ming Kai & Kamaruddin, Khairul Nizam', 1],
    ['Zheng, Yanna & Xin, Zhixia & Xie, Lingde & Ma, Libin', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    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);