function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gor’kovskogo Gosudarstvennogo Universiteta im N. I. Lobachevskogo. Seriya Biologicheskaya', 1],
    ['Izvestiya Tikhookeanskoi Nauchno-Promyslovi Ostantsii', 1],
    ['Journal of Parasitology', 1],
    ['Journal of Science of the Hiroshima University, Series B Division 1 (Zoology)', 1],
    ['Research Bulletin of the Meguro Parasitological Museum', 1],
    ['Systematic Parasitology', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=6)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);