function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 2],
    ['Biodiversity Data Journal', 2],
    ['Entomo Helvetica', 8],
    ['Far Eastern Entomologist', 3],
    ['Insecta Mundi', 7],
    ['Nota Lepidopterologica', 6],
    ['Proceedings of the Entomological Society of Washington', 1],
    ['Proceedings of the Linnean Society of New South Wales', 1],
    ['Tijdschrift voor Entomologie', 9],
    ['Trustees, British Museum', 1],
    ['Vestnik Zoologii', 2],
    ['ZooKeys', 4],
    ['Zoosystema', 1],
    ['Zootaxa', 91]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=138)',
    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);