function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Koenders, Annette', 5],
    ['Martens, Koen', 5],
    ['Meisch, Claude & Smith, Robin J. & Martens, Koen', 1],
    ['Pugh, P. J. A. & Dartnall, H. J. G. & McInnes, S. J.', 1],
    ['Shearn, Rylan & Halse, Stuart & Koenders, Annette & Schön, Isa', 4],
    ['Smith, Robin J. & Janz, Horst & Okubo, Ichiro', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);