function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annali del Museo Civico di Storia Naturale \' Giacomo Doria\'', 1],
    ['Bulletin of the Museum of Comparative Zoology at Harvard College, 3', 1],
    ['Bulletin of the United States National Museum', 1],
    ['Check List', 1],
    ['Copeia', 1],
    ['Newspaper Enterprise, Ltd.', 1],
    ['Philippine Journal of Science, Section D', 1],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 2],
    ['Proceedings of the Biological Society of Washington', 1],
    ['Publications of the Field Museum of Natural History, Zoölogical', 1],
    ['Zoologische Jahrbucher, Abteilung für Systematik', 3],
    ['Zootaxa', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=16)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);