function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Biologica Sibirica', 100],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 1],
    ['Cretaceous Research', 2],
    ['In: Brullé, Histoire naturelle des animaux articulés .., t. 3. P. Duménil', 1],
    ['J. Zool. Syst. Evol. Research', 1],
    ['Journal of Natural History', 5],
    ['Linzer biologische Beiträge', 1],
    ['Raspe', 1],
    ['The Entomologist', 1],
    ['ZooKeys', 33],
    ['Zoological Journal of the Linnean Society', 1],
    ['Zoologischer Anzeiger', 1],
    ['Zootaxa', 13]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=161)',
    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);