function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ge, Shujuan & Yang, Xingke & Liu, Haoyu & Yang, Yuxia', 21],
    ['Hsiao, Yun', 3],
    ['Hsiao, Yun & Okushima, Yûichi & Yang, Ping-Shih', 10],
    ['Yang, Yu-Xia & Yang, Xing-Ke', 1],
    ['Yang, Yuxia & Ge, Shujuan & Yang, Xingke & Liu, Haoyu', 26],
    ['Yang, Yuxia & Su, Junyan & Yang, Xingke', 12],
    ['Švihla, Vladimír', 20]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=93)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);