function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Parasitologica', 10],
    ['Check List', 7],
    ['Folia Parasitologica', 16],
    ['International Journal for Parasitology: Parasites and Wildlife', 6],
    ['Journal of Natural History', 62],
    ['Parasite', 14],
    ['Parasitology Research', 9],
    ['PeerJ', 7],
    ['Raffles Bulletin of Zoology', 7],
    ['Species Diversity', 26],
    ['Systematic Parasitology', 51],
    ['ZooKeys', 243],
    ['Zoologia', 8],
    ['Zoosystema', 389],
    ['Zootaxa', 314],
    ['Other (20)', 42]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=1211)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);