function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bulletin of the United States Geological and Geographical Survey of the Territories', 1],
    ['Check List', 2],
    ['Handbook of the Mammals of the World – Volume 1 Carnivores', 2],
    ['J. J. Dubochet et Ce', 3],
    ['Magasin Encyclopédique, ou Journal des Sciences, des Lettres et des Arts', 1],
    ['Mammal Species of the World (1 st Edition)', 3],
    ['Mammal Species of the World (2 nd Edition)', 3],
    ['Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1', 12],
    ['North American Fauna', 1],
    ['Nouveau dictionnaire d\'histoire naturelle, appliquée aux arts, à l\'agriculture, à l\'économie rurale et domestique, à la médecine', 1],
    ['Proceedings of the Biological Society of Washington', 3],
    ['Proceedings of the Boston Society of Natural History', 1],
    ['Proceedings of the United States National Museum', 1],
    ['The Magazine of Natural History, n. s.', 1],
    ['Zootaxa', 3],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=39)',
    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);