function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Desutter-Grandcolas, Laure & Jaiswara, Ranjana', 1],
    ['Hollier, John & Bruckner, Harald & Heads, Sam W.', 1],
    ['Meena, Ashok Kumar & Swaminathan, Rajamai & Nagar, Rajendra', 1],
    ['Meena, Ashok Kumar & Swaminathan, Rajamani & Nagar, Rajendra', 4],
    ['Wang, Jiliang & Zhang, Dongxiao & Wei, Xiao & Liu, Haoyu', 1],
    ['Zhang, Ling & Shen, Chu-Ze & Tian, Di & Liu, Yun-Fei & Li, Kai', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    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);