function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Societatis Regiae Scientiarum Indo-Neêrlandicae', 1],
    ['Allgemeine Literatur-Zeitung', 1],
    ['Annales de la Société Impériale d\'Agriculture, Histoire Naturelle de Lyon', 3],
    ['Annales des Sciences Naturelles, Zoologie, Série 4', 4],
    ['Anzeiger', 1],
    ['Bronner', 1],
    ['Bulletin du Muséum National d’Histoire Naturelle, Série 2', 1],
    ['European Journal of Taxonomy', 3],
    ['Laurentius Salvius', 9],
    ['Privately published', 2],
    ['Proceedings of the Zoological Society of London, B', 3],
    ['Sanderiano Commissum', 5],
    ['Schmerber', 2],
    ['Transactions of the American Philosophical Society', 2],
    ['Zootaxa', 3],
    ['Other (19)', 19]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=60)',
    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);