function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 23],
    ['Boll Lab Ent Agrar F Silvestri', 1],
    ['Check List', 1],
    ['Entomologist\'s monthly magazine', 1],
    ['Insecta Mundi', 5],
    ['Journal of Hymenoptera Research', 11],
    ['Journal of Natural History', 115],
    ['Linzer biologische Beiträge', 2],
    ['Oriental insects', 1],
    ['Proceedings of the Entomological Society of Washington', 2],
    ['Proceedings of the Hawaiian Entomological Society', 2],
    ['Proceedings of the United States National Museum', 1],
    ['United States Department of Agriculture Technical Series Bulletin', 2],
    ['ZooKeys', 3],
    ['Zootaxa', 27],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=199)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);