function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Conchylia', 4],
    ['European Journal of Taxonomy', 55],
    ['Invertebrate systematics', 9],
    ['Journal of Natural History', 3],
    ['Malacologia', 56],
    ['Memoirs of the Queensland Museum, Nature', 10],
    ['Molluscan research', 7],
    ['Raffles Bulletin of Zoology', 34],
    ['Records of the Australian Museum', 73],
    ['The Beagle. Records of the Museums and Art Galleries of the Northern Territory', 4],
    ['ZooKeys', 330],
    ['Zoological Journal of the Linnean Society', 60],
    ['Zoosystema', 6],
    ['Zoosystematics and Evolution', 5],
    ['Zootaxa', 19],
    ['Other (11)', 15]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=690)',
    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);