function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Arachnologica', 7],
    ['Biodiversity Data Journal', 25],
    ['Bulletin of the American Museum of Natural History', 88],
    ['European Journal of Taxonomy', 511],
    ['Journal of Natural History', 25],
    ['Journal of Species Research', 5],
    ['Memoirs of the National Science Museum, Tokyo', 3],
    ['Raffles Bulletin of Zoology', 7],
    ['Turkish Journal of Zoology', 4],
    ['ZooKeys', 92],
    ['Zoological Journal of the Linnean Society', 65],
    ['Zoological Systematics', 3],
    ['Zoosystema', 4],
    ['Zoosystematics and Evolution', 13],
    ['Zootaxa', 771],
    ['Other (15)', 21]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=1644)',
    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);