function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Andreone, F. & Glaw, F. & Nussbaum, R. A. & Raxworthy, C. J.', 3],
    ['David Prötzel & Miguel Vences & Oliver Hawlitschek', 4],
    ['Proetzel, David & Lambert, Shea M.', 1],
    ['Prötzel, David & Ruthensteiner, Bernhard & Scherz, Mark D.', 2],
    ['Prötzel, David & Scherz, Mark D. & Ratsoavina, Fanomezana M.', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);