function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Di, Zhiyong & Xu, Xiaobo & Cao, Zhijian & Wu, Yingliang', 1],
    ['Kawai, Kazusa & Unnahachote, Thornthan & Suttisatid, Yossaphon', 8],
    ['Kovařík, František', 7],
    ['Kovařík, František & Lowe, Graeme & Ranawana, Kithsiri B.', 5],
    ['Kovařík, František & Ranawana, Kithsiri B.', 2],
    ['Lourenço, Wilson R. & Qi, Jian-Xin & Zhu, Ming-Sheng', 2],
    ['Monod, Lionel & Duperre, Nadine & Harms, Danilo', 1],
    ['Prendini, Lorenzo & Loria, Stephanie F.', 9],
    ['Tahir, H. Muhammad & Prendini, Lorenzo', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=36)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);