function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft', 3],
    ['Biodiversity Data Journal', 2],
    ['European Journal of Taxonomy', 2],
    ['Insecta Mundi', 1],
    ['International Journal of Myriapodology', 5],
    ['Invertebrate systematics', 1],
    ['Papéis Avulsos de Zoologia', 3],
    ['Public Library of Science, ONE', 2],
    ['Revue suisse de Zoologie', 12],
    ['Tropical Zoology', 10],
    ['ZooKeys', 53],
    ['Zoosystema', 1],
    ['Zootaxa', 57]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=152)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);