function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Almquist and Wiksells', 1],
    ['Annaes da Academia Brasileira de Sciencias', 1],
    ['Annalen des Naturhistorischen Museums in Wien', 1],
    ['Annales de la Société Entomologique de France, Séries 1 - 6', 3],
    ['Annali del Museo Civico di Storia Naturale de Genova, 3 a', 1],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 3],
    ['Bollettino del Laboratoria di Zoologia Generale e Agraria della R. Scuola sup. d\'Agricoltura, Portici', 1],
    ['Bulletin Scientifique de Bourgogne', 1],
    ['Bulletin de la Société Zoologique de France', 1],
    ['Canadian Entomologist', 2],
    ['European Journal of Taxonomy', 4],
    ['Ezhegodnik Zoologicheskogo muzeia', 2],
    ['Mitteilungen aus dem Zoologischen Museum in Berlin', 1],
    ['Természetrajzi Füzetek', 1],
    ['Zootaxa', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=26)',
    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);