function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Zoologica Academiae Scientiarum Hungaricae', 1],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 16],
    ['Biodiversity Data Journal', 69],
    ['Far Eastern Entomologist', 2],
    ['Indian J Ent', 1],
    ['Insects of Guam II', 2],
    ['Journal of Natural History', 1],
    ['Linzer biologische Beiträge', 60],
    ['Proceedings of the Entomological Society of Philadelphia', 1],
    ['Proceedings of the Literary and Philosophical Society of Manchester', 1],
    ['Proceedings of the United States National Museum, 3', 1],
    ['Transactions of the Entomological Society of London', 1],
    ['Turkish Journal of Zoology', 9],
    ['ZooKeys', 89],
    ['Zootaxa', 77]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=331)',
    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);