function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['African Invertebrates', 2],
    ['African invertebrates', 1],
    ['Annales de la Société Entomologique de France, Séries 1 - 6', 4],
    ['Berliner entomologische Zeitschrift / herausgegeben von dem Entomologischen Verein in Berlin', 1],
    ['Biodiversity Data Journal', 2],
    ['European Journal of Taxonomy', 5],
    ['Insecta Mundi', 1],
    ['Insects of Guam II', 4],
    ['Palaeontologia Electronica', 2],
    ['Proceedings of the Linnean Society of London, Zoology', 4],
    ['The Entomologist', 1],
    ['Transactions of the Maryland Academy of Science and Literature', 3],
    ['ZooKeys', 20],
    ['Zootaxa', 70]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=120)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);