function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Parasitologica', 2],
    ['Allan Hancock Pacific Expeditions', 2],
    ['Izvestiya Tikhookeanskoi Nauchno-Promyslovi Ostantsii', 1],
    ['Journal of Parasitology', 2],
    ['Journal of helminthology', 1],
    ['Publications of the Marine Biological Station Ghardaqa (Red Sea)', 3],
    ['Qatar University Science Bulletin', 1],
    ['Revista Ibérica de Parasitología', 1],
    ['Science Publications', 1],
    ['The American Midland Naturalist', 1],
    ['Transactions of the Biogeographical Society of Japan', 1],
    ['Tulane Studies in Zoology', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=18)',
    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);