function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Di, Zhiyong & Xu, Xiaobo & Cao, Zhijian & Wu, Yingliang', 8],
    ['Kovařík, František', 10],
    ['Kovařík, František & Král, Jiří & Kořínková, Tereza', 1],
    ['Kovařík, František & Lowe, Graeme & Forman, Martin & Král, Jiří', 2],
    ['Kovařík, František & Lowe, Graeme & Ranawana, Kithsiri B.', 2],
    ['Kovařík, František & Lowe, Graeme & Stockmann, Mark', 3],
    ['Kovařík, František & Lowe, Graeme & Šťáhlavský, František', 8],
    ['Lourenco, Wilson & Duhem, Bernard', 2],
    ['Lourenço, Wilson R. & Sun, Dong & Zhu, Mingsheng', 2],
    ['Volschenk, Erich S. & Mattoni, Camilo I. & Prendini, Lorenzo', 1],
    ['Yin, Shijin & Qiu, Yanning & Pan, Zhaohui & Li, Shaobin', 1],
    ['Zhu, Ming-Sheng & Lourenço, Guang-Xin Han And Wilson R.', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=44)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);