function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fanti, Fabrizio & Damgaard, Anders Leth', 1],
    ['Fanti, Fabrizio & Ghahari, Hassan', 1],
    ['Su, Junyan & Li, Limei & Yang, Yuxia & Yang, Xingke', 2],
    ['Su, Junyan & Yang, Yuxia & Yang, Xingke', 6],
    ['Yang, Yuxia & Kopetz, Andreas & Yang, Xingke', 5],
    ['Yang, Yuxia & Liu, Haoyu & Yang, Xingke', 6],
    ['Yang, Yuxia & Xi, Huacong & Yang, Xingke & Liu, Haoyu', 14],
    ['Yang, Yuxia & Zong, Le & Yang, Xingke & Liu, Haoyu', 10],
    ['Švihla, Vladimír', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=50)',
    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);