function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 5],
    ['Biodiversity Data Journal', 25],
    ['C. Reichard', 1],
    ['Entomological news', 1],
    ['Fossil Record', 1],
    ['Journal of Natural History', 2],
    ['Journal of the Proceedings of the Linnean Society, Zoology', 4],
    ['Kungliga Svenska Vetenskapsakademiens Handlingar', 1],
    ['Linzer biologische Beiträge', 57],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 2],
    ['Proceedings of the Manchester Literary and Philosophical Society', 1],
    ['Transactions of the American Entomological Society', 1],
    ['ZooKeys', 9],
    ['Zootaxa', 57]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=167)',
    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);