function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amazoniana', 1],
    ['Anales del Instituto de Biologia Universidad de Mexico', 1],
    ['Izdat " Nauka "', 1],
    ['Journal of Fujian Teachers University (Natural Science)', 1],
    ['Journal of Parasitology', 3],
    ['Journal of the Egyptian Veterinary Medical Association', 2],
    ['Papers from the Tortugas Laboratory of the Carnegie Institute of Washington', 2],
    ['Parasitology', 4],
    ['Parazitologicheskii Sbornik', 1],
    ['Revista Brasileira de Biologia', 1],
    ['Science Publications', 1],
    ['Scientific Survey of Porto Rico and the Virgin Islands', 1],
    ['ZooKeys', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);