function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 4],
    ['Check List', 2],
    ['Journal of Natural History', 52],
    ['Journal of Plankton Research', 2],
    ['Proceedings of the Biological Society of Washington', 3],
    ['Raffles Bulletin of Zoology', 4],
    ['Reports of Science Research Voyage of H. M. S. Challenger. Zoology', 20],
    ['Species Diversity', 4],
    ['The American Journal of Science and Arts, Series 2', 3],
    ['Turkish Journal of Zoology', 3],
    ['ZooKeys', 48],
    ['Zoological Journal of the Linnean Society', 7],
    ['Zoosystematica Rossica', 3],
    ['Zoosystematics and Evolution', 3],
    ['Zootaxa', 96],
    ['Other (13)', 14]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=268)',
    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);