function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 2],
    ['Bulletin of the British Museum (Natural History). Entomology', 1],
    ['Entomo Helvetica', 1],
    ['Evolutionary Systematics', 56],
    ['Linzer biologische Beiträge', 13],
    ['Mich. Friedr. Bartsch', 1],
    ['Méquignon-Marvis', 3],
    ['Nota Lepidopterologica', 30],
    ['Officina Libraria Kortii', 3],
    ['Zoosystema', 11],
    ['Zootaxa', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=123)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);