function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bekchiev, Rostislav & Hlaváč, Peter', 1],
    ['Bekchiev, Rostislav & Yin, Zi-Wei & Quang Vu, Manh & Tra, My Ha', 1],
    ['Huang, Meng-Chi & Li, Li-Zhen & Yin, Zi-Wei', 82],
    ['Huang, Meng-Chi & Yin, Zi-Wei', 22],
    ['Yin, Zi-Wei', 3],
    ['Yin, Zi-Wei & Hlavac, Peter & Li, Li-Zhen', 14],
    ['Yin, Zi-Wei & Li, Li-Zhen', 13],
    ['Yin, Zi-Wei & Li, Li-Zhen & Gu, Fu-Kang', 6],
    ['Yin, Zi-Wei & Li, Li-Zhen & Zhao, Mei-Jun', 14],
    ['Yin, Zi-Wei & Li, Ning', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=167)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);