function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 33],
    ['European Journal of Taxonomy', 33],
    ['Journal of Natural History', 56],
    ['Journal of Parasitology', 30],
    ['Memoirs of Museum Victoria', 33],
    ['Pacific insects', 55],
    ['Papéis Avulsos de Zoologia', 124],
    ['Records of the Australian Museum', 33],
    ['Revue suisse de Zoologie', 48],
    ['Russian Entomological Journal', 34],
    ['ZooKeys', 47],
    ['Zoological Journal of the Linnean Society', 70],
    ['Zoological Systematics', 22],
    ['Zoosystema', 22],
    ['Zootaxa', 1928],
    ['Other (63)', 304]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=2872)',
    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);