function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Societatis Regiae Scientiarum Indo-Neêrlandicae', 1],
    ['American Museum Novitates', 1],
    ['Archives Néerlandaises des Sciences Exactes et Naturelles', 1],
    ['Biodiversity Data Journal', 4],
    ['Bronner', 2],
    ['Bulletin of the United States Fish Commission', 1],
    ['Natuurkunde Tijdschrift voor Nederlandsche-Indië', 3],
    ['Nederlandsch Tijdschrift voor de Dierkunde', 1],
    ['Occasional Papers of the Bernice P. Bishop Museum', 1],
    ['Proceedings of the Zoological Acclimatisation Society of Victoria', 1],
    ['Proceedings of the Zoological Society of London, B', 2],
    ['Schmerber', 1],
    ['Verh. Phys. Med. Ges. Würzburg, N. S.', 1],
    ['Verslagen en Mededeelingen der Koninklijke Akademie van Wetenschappen. Afdeeling Natuurkunde', 2],
    ['Zootaxa', 6],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=30)',
    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);