function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Agricultural Research Council, Government of Pakistan', 2],
    ['Agriculture Pakistan', 1],
    ['Indian Journal of Parasitology', 1],
    ['Japanese Journal of Zoology', 2],
    ['Journal of Parasitology', 1],
    ['Nauchnye Doklady Vysshei Shkoly Biologicheskie Nauki', 1],
    ['Proceedings of the Helminthological Society of Washington', 1],
    ['Proceedings of the Indian Academy of Parasitology', 1],
    ['Rivista di Parassitologia', 1],
    ['Studia Marina Sinica', 1],
    ['Systematic Parasitology', 1],
    ['Zoologische Jahrbucher, Abteilung für Systematik', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);