function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['African Invertebrates', 2],
    ['Biodiversity Data Journal', 8],
    ['European Journal of Taxonomy', 5],
    ['Far Eastern Entomologist', 4],
    ['Insects of Guam II', 1],
    ['Linzer biologische Beiträge', 12],
    ['Magazin für Insektenkunde', 1],
    ['Officina Libraria Kortii', 1],
    ['Palaeoentomology', 5],
    ['Proft et Storch', 2],
    ['Public Library of Science, ONE', 5],
    ['Transactions of the Entomological Society of London', 1],
    ['ZooKeys', 7],
    ['Zoological Systematics', 8],
    ['Zootaxa', 64]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=126)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);