function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 10],
    ['Biodiversity Data Journal', 107],
    ['C. Fritsch', 2],
    ['Entomo Helvetica', 2],
    ['Ioannis Thomae Trattner', 3],
    ['Journal of Natural History', 17],
    ['Laurentii Salvii', 7],
    ['Laurentius Salvius', 70],
    ['Linzer biologische Beiträge', 188],
    ['Officina Libraria Kortii', 3],
    ['Proft et Storch', 1],
    ['Siegfried Lebrecht Crusius', 1],
    ['Transactions of the American Entomological Society', 1],
    ['Typis Hæredum Widmanstadii', 4],
    ['Zootaxa', 40]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=456)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);