function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Parasitologica', 2],
    ['Acta Parasitologica Polonica', 1],
    ['Arab Gulf Journal of Scientific Research, B (Agricultural and Biological Sciences)', 1],
    ['B. A. N. Z. Antarctic Research Expedition, Reports Series B (Zoology and Botany)', 4],
    ['Bulletin of the National Museum of Nature and Science, Series A (Zoology)', 2],
    ['Journal of Parasitology', 1],
    ['Parazitologiya', 1],
    ['Scientific Survey of Porto Rico and the Virgin Islands', 4],
    ['Systematic Parasitology', 1],
    ['Transactions of the American Microscopical Society', 1],
    ['Transactions of the Royal Society of New Zealand', 2],
    ['Trudy Biologo-pochvennogo Instituta, Novaya Seriya', 1],
    ['Tulane Studies in Zoology', 1],
    ['Tulane Studies in Zoology and Botany', 1],
    ['Zoologica Scripta', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=25)',
    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);