function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annales de la Société Entomologique de France, Séries 1 - 6', 1],
    ['Annals of the Entomological Society of America', 1],
    ['Annual report of the Agricultural Experiment Station', 1],
    ['Can Ent', 2],
    ['Canadian entomologist', 1],
    ['Entomological news', 1],
    ['Insecta Mundi', 4],
    ['Journal of the Bombay Natural History Society', 1],
    ['Journal of the Georgia Entomological Society', 1],
    ['Trans Proc N Z Inst', 1],
    ['Transactions and proceedings of the New Zealand Institute', 1],
    ['ZooKeys', 7],
    ['Zootaxa', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=31)',
    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);