function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annales de la Société Entomologique de France, Séries 1 - 6', 2],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 4],
    ['Archiv für Naturgeschichte', 2],
    ['Bulletin de la Société Zoologique de France', 1],
    ['E. Arnold', 1],
    ['F. G. Levrault', 1],
    ['Imprimerie Nationale', 1],
    ['Jahrbuch der Hamburgischen Wissenschaftlichen Anstalten', 1],
    ['Journal of the Bombay Natural History Society', 2],
    ['The Journal of the Linnean Society of London, Zoology', 2],
    ['Zoologische Jahrbücher, Abteilung für Systematik, Geographie und Biologie der Tiere', 3],
    ['Zootaxa', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=21)',
    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);