function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bulletin of Entomological Research', 1],
    ['Bulletin of the Illinois State Laboratory of Natural History', 1],
    ['Canadian Entomologist', 1],
    ['European Journal of Taxonomy', 4],
    ['Hawaii Agricultural Experiment Station Report', 1],
    ['Proceedings of the California Academy of Sciences', 1],
    ['Proceedings of the Entomological Society of Washington', 3],
    ['The Journal of the College of Agriculture, Tohoku Imperial University, Sapporo, Japan', 1],
    ['Zootaxa', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);