function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['American Museum Novitates', 2],
    ['Anzeiger', 1],
    ['Biodiversity Data Journal', 31],
    ['Bulletin of the Biogeographical Society of Japan', 1],
    ['European Journal of Taxonomy', 13],
    ['Journal Jinan Univ.', 1],
    ['Journal of Natural History', 7],
    ['Journal of the Marine Biological Association of the United Kingdom', 1],
    ['Lingnan Science Journal', 2],
    ['Records of the Australian Museum', 4],
    ['Report on the Scientific Results of the Voyage of H. M. S. Challenger During the Years 1873 – 76, Zoology', 9],
    ['Systematics and Biodiversity', 3],
    ['ZooKeys', 12],
    ['Zootaxa', 103]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=190)',
    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);