function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annalen des Naturhistorischen Museums in Wien', 1],
    ['Biodiversity Data Journal', 5],
    ['Bulletin of the Department of Zoology University of the Panjab (New Series)', 3],
    ['Japanese Journal of Zoology', 4],
    ['Proceedings of the National Academy of Sciences, India, Section B, Biological Sciences', 2],
    ['Scientific Survey of Porto Rico and the Virgin Islands', 1],
    ['The Biological Bulletin', 1],
    ['Zoodiversity', 4],
    ['Zootaxa', 14]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=35)',
    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);