function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['American Museum Novitates', 1],
    ['Australian Journal of Entomology', 1],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 2],
    ['Biodiversity Data Journal', 16],
    ['European Journal of Taxonomy', 6],
    ['Far Eastern Entomologist', 5],
    ['Insects of Guam II', 2],
    ['Journal of Natural History', 1],
    ['Linzer biologische Beiträge', 19],
    ['Nova Acta Physico-Medica. Academiae Caesareae Leopoldino Carolinae Naturae Curiosorum', 1],
    ['Transactions of the Entomological Society of London', 1],
    ['ZooKeys', 14],
    ['Zoodiversity', 1],
    ['Zootaxa', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=77)',
    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);