function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Archiv für Molluskenkunde', 1],
    ['Biodiversity Data Journal', 3],
    ['Contributions to Natural History', 17],
    ['European Journal of Taxonomy', 5],
    ['Geodiversitas', 3],
    ['Johan. Christi. Trappii', 1],
    ['Memoirs of the Museum of Comparative Zoology, at Harvard College', 1],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 1],
    ['Visaya', 52],
    ['Zoological Journal of the Linnean Society', 1],
    ['Zoosystema', 7],
    ['Zootaxa', 51]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=143)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);