function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Parasitologica', 2],
    ['Folia Parasitologica', 1],
    ['Journal of Parasitology', 2],
    ['Parasitology Research', 1],
    ['Results of the Swedish Zoological Expedition to Egypt and the White Nile 1901 under the Direction of L. A. Jägerskiöld', 1],
    ['Revista Mexicana de Biodiversidad', 1],
    ['Species Diversity', 4],
    ['Systematic Parasitology', 3],
    ['ZooKeys', 14],
    ['Zoosystema', 18],
    ['Zootaxa', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=58)',
    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);