function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Algemeene Konst- en Letter-Bode', 2],
    ['Anzeiger', 1],
    ['Arquivos do Museu Nacional Rio de Janeiro', 1],
    ['Bulletin de la Société Philomathique de Paris, Série 7', 1],
    ['Denkschriften der Kaiserlichen Akademie der Wissenschaften, Wien', 1],
    ['European Journal of Taxonomy', 2],
    ['Journal of the Academy of Natural Sciences of Philadelphia', 3],
    ['Natuurkunde Tijdschrift voor Nederlandsche-Indië', 4],
    ['Novi Commentarii Academiae Scientiarum Instituti Bononiensis', 1],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 2],
    ['Proceedings of the Linnean Society of New South Wales', 1],
    ['Proceedings of the Zoological Society of London, B', 3],
    ['Schmerber', 2],
    ['Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften, Mathematisch-Naturwissenschaften Classe', 3],
    ['Zootaxa', 5],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=36)',
    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);