function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biffi, Gabriel & Constantin, Robert', 21],
    ['Biffi, Gabriel & Geiser, Michael', 31],
    ['Constantin, Robert', 23],
    ['Fanti, Fabrizio & Damgaard, Anders Leth', 33],
    ['Fanti, Fabrizio & Ghahari, Hassan', 64],
    ['Linnaeus, Carolus', 33],
    ['Takahashi, Kazuhiro', 75],
    ['Wittmer, Walter', 27],
    ['Yang, Yuxia & Ge, Shujuan & Yang, Xingke & Liu, Haoyu', 26],
    ['Yang, Yuxia & Su, Junyan & Yang, Xingke', 34],
    ['Yang, Yuxia & Yang, Xingke', 22],
    ['Yildirim, E. & Kopetz, A. & Bulak, Y.', 22],
    ['Zhang, Lulu & Yang, Yuxia & Okushima, Yûichi', 24],
    ['Švihla, Vladimír', 89],
    ['Švihla, Vladimír & Kopetz, Andreas', 32],
    ['Other (94)', 489]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=1045)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);