function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['African Invertebrates', 5],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 1],
    ['Beiträge zur entomologie', 1],
    ['Biodiversity Data Journal', 2],
    ['Bulletin of the National Science Museum, Series A (Zoology)', 1],
    ['Entomo Helvetica', 2],
    ['Japanese Journal of Systematic Entomology', 6],
    ['Journal of Natural History', 55],
    ['Linzer biologische Beiträge', 4],
    ['Mémoires Présentés par Divers Savans à l\'Académie Royale des Sciences de l\'Institut de France, et Imprimés par son Ordre', 1],
    ['Papéis Avulsos de Zoologia', 1],
    ['ZooKeys', 5],
    ['Zoosystema', 9],
    ['Zootaxa', 177]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=270)',
    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);