function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anais da Academia Brasileira de Ciencias', 1],
    ['Annuario del Museo Zoologico della Università di Napoli', 2],
    ['Archives de Zoologie Expérimentale et Générale: Hitorire Naturelle, Morphologie, Histologie, Évolution des Animaux', 3],
    ['Bulletin de la Société Entomologique de France', 2],
    ['Entomologisk Tidskrift', 4],
    ['Naturalista Siciliano', 1],
    ['Quarterly journal of microscopical science, n. s.', 1],
    ['Revue suisse de zoologie', 1],
    ['The American Naturalist', 2],
    ['Zoologischer Anzeiger', 1],
    ['Zootaxa', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=19)',
    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);