function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Protozoologica', 9],
    ['Biodiversity Data Journal', 16],
    ['Journal of Eukaryotic Microbiology', 1],
    ['Journal of Natural History', 27],
    ['Parasites & Vectors', 2],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 1],
    ['Subterranean Biology', 1],
    ['The Journal of Eukaryotic Microbiology', 1],
    ['Transactions of the American Microscopical Society', 1],
    ['Vestnik Zoologii', 1],
    ['Zootaxa', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=65)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);