function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arefina, Tatyana I.', 1],
    ['Graf, Wolfram & Waringer, Johann & Dürregger, Alexander', 2],
    ['Ibrahimi, Halil & Kučinić, Mladen & Vitecek, Simon', 1],
    ['Ito, Tomiko & Kuhara, Naotoshi & Katsuma, Nobuyuki', 1],
    ['Malicky, H.', 2],
    ['Malicky, Hans', 5],
    ['Malicky, Hans & Melnitsky, Stanislav I. & Ivanov, Vladimir D.', 1],
    ['Mey, Wolfram & Malicky, Hans', 3],
    ['Pandher, Manpreet Singh & Kaur, Simarjit & Garima, Deepti', 1],
    ['Waringer, Johann & Malicky, Hans & Graf, Wolfram', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    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);