function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 5],
    ['Bulletin de la Société Philomathique de Paris, Série 7', 1],
    ['Check List', 2],
    ['Copeia', 1],
    ['Das Aquarium', 1],
    ['Ichthyological Research', 1],
    ['Journal of Threatened Taxa', 1],
    ['Monatsberichte der Akademie der Wissenschaft zu Berlin', 1],
    ['Raffles Bulletin of Zoology', 11],
    ['Records of the Indian Museum', 1],
    ['Turkish Journal of Zoology', 1],
    ['Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien', 1],
    ['Wolfgang Gerle', 1],
    ['Zootaxa', 29]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=57)',
    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);