function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A. F. Rose', 1],
    ['Annales Musei Nationalis Hungarici', 1],
    ['Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano', 1],
    ['Beverley Tucker', 1],
    ['Denkschriften der Kaiserlichen Akademie der Wissenschaften, Wien', 1],
    ['European Journal of Taxonomy', 3],
    ['F. Schoell', 7],
    ['Giornale di Fisica, Chimica e Storia Naturale, Medicina ed Arti, Pavia, ed Arti Pavia', 1],
    ['Journal de Physique, de Chimie, d\'Histoire Naturelle et des Arts', 1],
    ['Longman, Brown', 1],
    ['Maurolico, Messina', 1],
    ['Naturalista Siciliano', 1],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 1],
    ['Proceedings of the Royal Physical Society of Edinburgh.', 1],
    ['Zootaxa', 3],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=27)',
    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);