function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cowie, Robert H.', 9],
    ['Cowie, Robert H. & Héros, Virginie', 1],
    ['Harzhauser, Mathias & Neubauer, Thomas A. & Kadolsky, Dietrich', 1],
    ['Neubert, Eike & Damme, Dirk van', 2],
    ['Ng, Ting Hui & Dulipat, Jasrul & Foon, Junn Kitt', 2],
    ['Ng, Ting Hui & Jeratthitikul, Ekgachai & Sutcharit, Chirasak', 3],
    ['Röding, Peter Friedrich', 1],
    ['Tripathy, Basudev & Sajan, Sheikh & Cowie, Robert H.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);