function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arthropod fauna of the UAE', 6],
    ['Biodiversity Data Journal', 6],
    ['C. G. Proft, Fil. et Soc.', 1],
    ['Deutsche Entomologische Zeitschrift', 19],
    ['E. W. Janson', 2],
    ['European Journal of Taxonomy', 28],
    ['Far Eastern Entomologist', 29],
    ['Insecta Mundi', 1],
    ['Journal of the Proceedings of the Linnean Society of London, Zoology', 10],
    ['Linzer biologische Beiträge', 30],
    ['Officina Libraria Kortii', 1],
    ['Zoosystematics and Evolution', 1],
    ['Zootaxa', 110]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=244)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);