function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Zoologica Sinica', 1],
    ['Archivos da Escola superior de Agricultura e Medicina veterinaria. Nictheroy', 1],
    ['Biodiversity Data Journal', 1],
    ['Canadian Journal of Zoology', 1],
    ['Centralblatt für Bakteriologie, Parasitenkunde und Infektionskrankheiten', 2],
    ['Exploration du Parc national Congo Belge Miss Baer & Gerber', 2],
    ['Folha Medica Rio de Janeiro', 1],
    ['Japanese Journal of Veterinary Research', 1],
    ['Journal of helminthology', 1],
    ['Philippine Journal of Science, Section D', 1],
    ['Proceedings of the Helminthological Society of Washington', 2],
    ['Proceedings of the Zoological Society of London', 1],
    ['Rev. Vet. e Zootech., Rio de Janeiro,', 1],
    ['Revista de Biologia Tropical', 1],
    ['Zeitschrift für Parasitenkunde', 2],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);