function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anales del Instituto de Biología, Universidad Nacional Autónoma de México. (Serie Ciencia del Mar y Limnologia)', 1],
    ['Japanese Journal of Zoology', 2],
    ['Journal of Fujian Teachers University (Natural Science)', 1],
    ['Neotropica', 1],
    ['Parasitology', 1],
    ['Rev. Inst. Nac. Invest. Ciencias Nat. " Bernardino Riggi. "', 1],
    ['Revue suisse de Zoologie', 3],
    ['Systematic Parasitology', 3],
    ['The American Midland Naturalist', 3],
    ['Trudy Zoologicheskogo Instituta, Leningrad', 1],
    ['Zoological Magazine Tokyo', 1],
    ['Zoologischer Anzeiger', 1],
    ['Zootaxa', 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);