function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Archiv für Naturgeschichte, Abteilung A', 2],
    ['Biodiversity Data Journal', 8],
    ['Entomo Helvetica', 1],
    ['Insecta Mundi', 75],
    ['Journal of Natural History', 6],
    ['Linzer biologische Beiträge', 3],
    ['Méquignon-Marvis', 1],
    ['New Zealand Institute', 1],
    ['Officina Lewerentziana', 1],
    ['The Scientific Transactions of the Royal Dublin Society, Series 2', 2],
    ['Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien', 1],
    ['Wiener entomologische Zeitung', 1],
    ['ZooKeys', 16],
    ['Zootaxa', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=127)',
    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);