function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Advances in ant systematics (Hymenoptera: Formicidae): Homage to E. O. Wilson - 50 years of contributions.', 2],
    ['Arthropod fauna of the UAE', 3],
    ['Belgian Journal of Entomology', 3],
    ['Biodiversity Data Journal', 14],
    ['Bulletin de la Société Entomologique de France', 1],
    ['European Journal of Taxonomy', 1],
    ['Fauna Entomologica Scandinavica', 2],
    ['Journal of Hymenoptera Research', 1],
    ['Journal of Natural History', 1],
    ['Proceedings of the Institute of Zoology', 1],
    ['Revue suisse de Zoologie', 1],
    ['ZooKeys', 2],
    ['Zoosystema', 1],
    ['Zootaxa', 106]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=139)',
    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);