function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Archiv für Naturgeschichte', 1],
    ['Biodiversity Data Journal', 32],
    ['European Journal of Taxonomy', 2],
    ['Gustav Fischer', 1],
    ['Invertebrate Systematics', 4],
    ['Journal of Natural History', 8],
    ['Kuroshio Biosphere', 4],
    ['Records of the Australian Museum', 1],
    ['Species Diversity', 14],
    ['ZooKeys', 13],
    ['Zoological Journal of the Linnean Society', 23],
    ['Zoological Studies', 3],
    ['Zoological studies', 2],
    ['Zoosystema', 40],
    ['Zootaxa', 100]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=248)',
    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);