function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Australian entomologist', 1],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 4],
    ['Biodiversity Data Journal', 29],
    ['Catalogue of the Lepidoptera Phalaenae in the British Museum', 5],
    ['Ecologica Montenegrina', 30],
    ['Entomo Helvetica', 3],
    ['Far Eastern Entomologist', 5],
    ['Insecta Mundi', 5],
    ['Insects of Guam II', 2],
    ['Linzer biologische Beiträge', 7],
    ['Records of the Zoological Survey of India', 2],
    ['Transactions of the Entomological Society of London', 1],
    ['Vestnik Zoologii', 1],
    ['ZooKeys', 3],
    ['Zootaxa', 375]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=473)',
    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);