function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Doklady Akademii nauk Tadzhikistoi SSR', 1],
    ['Indian Journal of Helminthology', 1],
    ['Izvestiya Akad Nauk kirgiz SSR', 1],
    ['Journal of helminthology', 3],
    ['Philippine Journal of Science, Section D', 1],
    ['Proceedings of the Helminthological Society of Washington', 1],
    ['Proceedings of the Indian Academy of Sciences, Section B', 1],
    ['Proceedings of the National Academy of Sciences, India, Section B, Biological Sciences', 1],
    ['Records of the Indian Museum', 1],
    ['Rivista di Parassitologia', 1],
    ['Zeitschrift für Parasitenkunde', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);