function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Biologica Sibirica', 2],
    ['Biodiversity Data Journal', 4],
    ['Caucasian Entomological Bulletin', 1],
    ['Far Eastern Entomologist', 1],
    ['Fragmenta entomologica', 1],
    ['Insecta Mundi', 5],
    ['Insects of Guam II', 1],
    ['Journal of Natural History', 1],
    ['Journal of Threatened Taxa', 3],
    ['Linzer biologische Beiträge', 2],
    ['Mémoires du Muséum national d\'Histoire naturelle', 2],
    ['Umwelt-Vollzug', 3],
    ['Zoosystema', 2],
    ['Zootaxa', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=40)',
    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);