function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bulletin of the National Science Museum, Series A, Zoology', 3],
    ['Conchylia', 1],
    ['Geodiversitas', 4],
    ['Geological Survey Professional Paper', 1],
    ['J. White', 1],
    ['Johan. Christi. Trappii', 9],
    ['K. K. Hof-naturalien-cabinet', 1],
    ['Laurentii Salvii', 1],
    ['Laurentius Salvius', 29],
    ['Proceedings of the Zoological Society of London', 2],
    ['Records of the Western Australian Museum', 1],
    ['Transactions of the Wagner Free Institute of Science of Philadelphia', 1],
    ['U. S. Geological Survey, Professional Paper', 1],
    ['Visaya', 18],
    ['Zootaxa', 35]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=108)',
    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);