function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Ichthyologica et Piscatoria', 1],
    ['Annales de la Société Impériale d\'Agriculture, Histoire Naturelle de Lyon', 2],
    ['Beitr. Landesk. Oesterreich.', 1],
    ['Bol. Soc. Espan. Hist. Nat.', 2],
    ['Check List', 1],
    ['Cybium', 2],
    ['European Journal of Taxonomy', 9],
    ['Giornale di Scienze, Lettere ed Arti per la Sicilia', 1],
    ['Mémoires du Muséum National d’Histoire Naturelle, Série A, Zoologie', 1],
    ['Note Ist. Biol. Mar. Rovigno', 1],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 1],
    ['The Pacific', 1],
    ['Trudy Otdela Ichtiol. Russ. Obsc. Akklimat. Zhiv. Moskva.', 1],
    ['Turkish Journal of Zoology', 1],
    ['Zootaxa', 10]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=35)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);