function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Araujo, Rodrigo O. & Giovanni, Filippo Di', 3],
    ['Broad, Gavin R.', 18],
    ['Kolarov, J.', 3],
    ['Riedel, Matthias & Diller, Erich & Japoshvili, George', 4],
    ['Scaramozzino, Pier Luigi & Giovanni, Filippo Di & Loni, Augusto', 1],
    ['Schwarz, Martin & Holy, Kamil', 1],
    ['Vas, Zoltán', 15]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=45)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);