function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boston Journal of Natural History', 2],
    ['Botanica Marina', 7],
    ['Check List', 6],
    ['Cryptogamie, Algologie', 8],
    ['Edinburgh Journal of Natural and Geographical Sciences', 1],
    ['European Journal of Taxonomy', 15],
    ['Iheringia, Série Botânica', 1],
    ['Mémoires Présentés à l\'Académie Impériale des Sciences de St. Pétersbourg par Divers Savants, et lus dans ses Assemblées', 1],
    ['Nouveaux Mémoires de la Société Impériale des Naturalistes de Moscou', 2],
    ['Phytotaxa', 82],
    ['Proceedings of the Boston Society of Natural History', 1],
    ['Report of the British Association for the Advancement of Science', 2],
    ['The Pacific', 1],
    ['The Zoologist: A Popular Miscellany of Natural History, Second Series', 1],
    ['Öfversigt af Konglelige Vetenskaps-Akademiens Förhandlingar', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=131)',
    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);