function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A. Constable', 2],
    ['Aqua, Journal of Ichthyology and Aquatic Biology', 1],
    ['Biodiversity Data Journal', 2],
    ['Check List', 1],
    ['Copeia', 2],
    ['Ichthyological Exploration of Freshwaters', 2],
    ['International Journal of Pure and Applied Zoology', 2],
    ['Journal of Natural History', 5],
    ['Journal of Threatened Taxa', 1],
    ['Memoirs of the California Academy of Sciences', 1],
    ['Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut', 1],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 1],
    ['Raffles Bulletin of Zoology', 2],
    ['Turkish Journal of Zoology', 2],
    ['Zootaxa', 22],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=53)',
    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);