function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Archiv für Naturgeschichte', 1],
    ['Biodiversity Data Journal', 11],
    ['Bulletin of Marine Science of the Gulf and Caribbean', 5],
    ['Bulletin of the National Science Museum, Series A (Zoology)', 1],
    ['European Journal of Taxonomy', 8],
    ['Geodiversitas', 3],
    ['Hallageriis', 1],
    ['NIWA', 6],
    ['Nauplius', 2],
    ['Raffles Bulletin of Zoology', 4],
    ['Records of the Australian Museum', 17],
    ['Wolfgang Gerle', 1],
    ['ZooKeys', 3],
    ['Zoosystema', 31],
    ['Zootaxa', 105]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=199)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);