function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 16],
    ['Biodiversity Data Journal', 14],
    ['Bulletin of the British Museum (Natural History). Entomology', 1],
    ['Carolum Reichard', 5],
    ['Der Gesellschaft naturforschender Freunde zu Berlin, neue Schriften', 1],
    ['Deutsche Entomologische Zeitschrift', 3],
    ['E. W. Janson', 5],
    ['Entomo Helvetica', 1],
    ['Far Eastern Entomologist', 7],
    ['Journal of Natural History', 21],
    ['Linzer biologische Beiträge', 344],
    ['Proceedings of the Hawaiian Entomological Society', 2],
    ['ZooKeys', 36],
    ['Zoological Systematics', 17],
    ['Zootaxa', 354],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=832)',
    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);