function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A. F. Rose', 1],
    ['European Journal of Taxonomy', 1],
    ['F. G. Levrault', 1],
    ['Kongelige Danske Videnskabernes Selskab Skrifter (Nya Samlinger)', 1],
    ['Laurentius Salvius', 5],
    ['Nodder & Company', 1],
    ['Panckoucke', 1],
    ['Proceedings of the Boston Society of Natural History', 1],
    ['Proceedings of the Zoological Society of London, B', 2],
    ['Trans. N. Z. Inst.', 1],
    ['Transactions of the Literary and Philosophical Society of New York', 1],
    ['Zootaxa', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);