function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fanti, Fabrizio & Damgaard, Anders Leth', 1],
    ['Hsiao, Yun & Okushima, Yûichi', 3],
    ['Hsiao, Yun & Okushima, Yûichi & Yang, Ping-Shih', 11],
    ['Hsiao, Yun & Okushima, Yûichi Dr.', 1],
    ['Okushima, Yûichi Dr. & Hsiao, Yun', 1],
    ['Wang, Younan & Liu, Haoyu & Yang, Xingke & Yang, Yuxia', 19],
    ['Xi, Huacong & Wang, Younan & Yang, Xingke & Liu, Haoyu', 8],
    ['Yang, Yu-Xia & Yang, Xing-Ke', 8],
    ['Yang, Yuxia & Kopetz, Andreas & Yang, Xingke', 10],
    ['Yang, Yuxia & Su, Junyan & Yang, Xingke', 16],
    ['Yang, Yuxia & Yang, Xingke', 7],
    ['Švihla, Vladimír', 19]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=104)',
    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);