function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ballière', 17],
    ['Biodiversity Data Journal', 129],
    ['Check List', 3],
    ['Insecta Mundi', 16],
    ['Insects of Guam II', 12],
    ['Journal of Hymenoptera Research', 20],
    ['Journal of Natural History', 165],
    ['Linzer biologische Beiträge', 35],
    ['Proceedings of the Entomological Society of Washington', 7],
    ['Proceedings of the Hawaiian Entomological Society', 5],
    ['Systematic entomology', 10],
    ['Turkish Journal of Zoology', 9],
    ['United States Department of Agriculture Technical Series Bulletin', 4],
    ['ZooKeys', 13],
    ['Zootaxa', 86],
    ['Other (20)', 26]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=557)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);