function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['African Invertebrates', 1],
    ['Bollettino di Zoologia', 3],
    ['Cahiers de Biologie Marine', 2],
    ['European Journal of Taxonomy', 27],
    ['Evolutionary Systematics', 7],
    ['Journal of Natural History', 15],
    ['Mikrofauna des Meeresbodens', 4],
    ['Proceedings of the Biological Society of Washington', 2],
    ['Raffles Bulletin of Zoology', 10],
    ['Transactions of the American Microscopical Society', 2],
    ['ZooKeys', 9],
    ['Zoological Journal of the Linnean Society', 19],
    ['Zoologischer Anzeiger', 7],
    ['Zoosystematics and Evolution', 8],
    ['Zootaxa', 670],
    ['Other (20)', 20]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=806)',
    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);