function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amurian Zoological Journal', 2],
    ['Biodiversity Data Journal', 18],
    ['Bulletin of the National Science Museum, Series A (Zoology)', 4],
    ['Caucasian Entomological Bulletin', 1],
    ['Contributions to Natural History', 3],
    ['Deutsche Entomologische Zeitschrift', 5],
    ['Ecologica Montenegrina', 1],
    ['Entomo Helvetica', 7],
    ['European Journal of Taxonomy', 42],
    ['Journal of Natural History', 1],
    ['Linzer biologische Beiträge', 6],
    ['The Coleopterists Bulletin', 1],
    ['ZooKeys', 85],
    ['Zootaxa', 133]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=309)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);