function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 5],
    ['European Journal of Taxonomy', 35],
    ['Journal of Natural History', 45],
    ['Journal of the Imperial Fisheries Institute, Tokyo', 1],
    ['Mémoires du Muséum national d\'Histoire naturelle', 3],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 1],
    ['Proceedings of the Biological Society of Washington', 1],
    ['Raffles Bulletin of Zoology', 68],
    ['Records of the Zoological Survey of India', 2],
    ['ZooKeys', 21],
    ['Zoological Journal of the Linnean Society', 15],
    ['Zoological studies', 1],
    ['Zoosystema', 2],
    ['Zootaxa', 143]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=343)',
    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);