function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bennett, Robb & Copley, Claudia & Copley, Darren', 1],
    ['Bosmans, Robert', 3],
    ['Bosselaers, Jan', 3],
    ['Isaia, Marco & Paschetta, Mauro & Chiarle, Alberto', 1],
    ['Reboleira, Ana Sofia P. S. & Pérez, Antonio José', 3],
    ['Seropian, Armen & Bulbulashvili, Natalia & Krammer, Hans-Joachim', 1],
    ['Ubick, Darrell & Vetter, Richard S.', 1],
    ['Wunderlich, Joerg', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    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);