function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Medicinae Okayama', 1],
    ['Acta Zootaxonomica Sinica', 2],
    ['Akademiya Nauk SSSR', 1],
    ['Gor’kovskogo Gosudarstvennogo Universiteta im N. I. Lobachevskogo. Seriya Biologicheskaya', 1],
    ['Journal of Parasitology', 2],
    ['Journal of helminthology', 1],
    ['Marathwada University Journal of Science Sect B Biol Sci', 1],
    ['Memorias de la Sociedad Cubana de Historia Natural - Felipe Poey-', 1],
    ['PKV Research Journal', 1],
    ['Pakistan Journal of Zoology', 3],
    ['Rivista di Parassitologia', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=16)',
    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);