function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Entomologica Musei Nationalis Pragae', 25],
    ['Annales de la Société Entomologique de France, Nouvelle Série', 2],
    ['Annales de la Société entomologique de France', 2],
    ['Heteropterus, Revista de Entomología', 1],
    ['Journal of Natural History', 1],
    ['Linzer biologische Beiträge', 8],
    ['Nouvelle Revue d\'Entomologie, Nouvelle Serie', 13],
    ['Revista del Museo Argentino de Ciencias Naturales, n. s.', 10],
    ['Russian Entomological Journal', 1],
    ['Russian entomological journal', 1],
    ['ZooKeys', 22],
    ['Zoosystema', 2],
    ['Zootaxa', 93]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=181)',
    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);