function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['American Museum Novitates', 6],
    ['Bulletin of entomological research', 1],
    ['Comparative Cytogenetics', 1],
    ['European Journal of Taxonomy', 8],
    ['Fauna of New Zealand', 4],
    ['Insecta Mundi', 16],
    ['Journal of Natural History', 7],
    ['Revue Zoologique, par la Société Cuvierienne', 1],
    ['Transactions and proceedings of the New Zealand Institute', 1],
    ['Transactions of the Linnean Society of London', 1],
    ['Tropical Zoology', 2],
    ['ZooKeys', 12],
    ['Zoosystema', 9],
    ['Zootaxa', 247]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=316)',
    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);