function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Societatis Regiae Scientiarum Indo-Neêrlandicae', 1],
    ['Ann. Natal Mus. P\'mburg', 2],
    ['Annales de la Société Impériale d\'Agriculture, Histoire Naturelle de Lyon', 1],
    ['Annales des Sciences Naturelles, Zoologie, Série 4', 1],
    ['Archiv für Naturgeschichte', 1],
    ['Australian zoologist', 1],
    ['Bulletin of the United States Fish Commission', 3],
    ['Check List', 2],
    ['Laurentius Salvius', 10],
    ['Natuurkunde Tijdschrift voor Nederlandsche-Indië', 2],
    ['Nederlandsch Tijdschrift voor de Dierkunde', 2],
    ['New Zealand Journal of Science and Technology', 2],
    ['Nodder & Company', 2],
    ['Occasional Papers of the Bernice P. Bishop Museum', 2],
    ['Zootaxa', 5],
    ['Other (18)', 18]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=55)',
    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);