function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 2],
    ['Gr Basin Nat', 1],
    ['Journal of the Academy of Natural Sciences of Philadelphia', 2],
    ['Mitteilungen über Höhlen- und Karstforschung', 1],
    ['Proceedings of the Zoological Society of London', 1],
    ['Psyche', 1],
    ['Revue suisse de Zoologie', 1],
    ['Species Diversity', 2],
    ['Zootaxa', 36]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=47)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);