function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anales del Instituto de Biologia Universidad de Mexico', 1],
    ['Annales de Parasitologie Humaine et Comparée', 3],
    ['Bulletin of the Department of Zoology University of the Panjab (New Series)', 1],
    ['Bulletin of the National Science Museum, Series A, Zoology', 1],
    ['Bulletin of the Zoological Survey of India', 2],
    ['Journal of Natural History', 2],
    ['Journal of helminthology', 2],
    ['Keigaku Publishing Company', 3],
    ['Papers from the Tortugas Laboratory of the Carnegie Institute of Washington', 1],
    ['Publications of the Marine Biological Station Ghardaqa (Red Sea)', 1],
    ['Qatar University Science Bulletin', 1],
    ['The American Midland Naturalist', 1],
    ['Tulane Studies in Zoology', 1],
    ['Tulane Studies in Zoology and Botany', 1],
    ['Zootaxa', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=23)',
    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);