function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beaver, R. A. & Liu, L. Y.', 1],
    ['Beaver, R. A. & Sittichaya, W. & Liu, L-Y.', 2],
    ['Hulcr, Jiri & Cognato, Anthony I.', 6],
    ['Rabaglia, Robert J. & Beaver, Roger A. & Johnson, Andrew J.', 1],
    ['Sittichaya, Wisut & Smith, Sarah M. & Beaver, Roger A.', 1],
    ['Smith, Sarah M. & Beaver, Roger A. & Cognato, Anthony I.', 4],
    ['Smith, Sarah M. & Beaver, Roger A. & Pham, Thai Hong', 1],
    ['Smith, Sarah M. & Beaver, Roger A. & Sittichaya, Wisut', 6],
    ['Zavedeev, E. V. & Jäggi, B. & Zürcher, Josef', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);