function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Societatis Regiae Scientiarum Indo-Neêrlandicae', 1],
    ['Annales de la Société Impériale d\'Agriculture, Histoire Naturelle de Lyon', 1],
    ['Anzeiger', 1],
    ['Biodiversity Data Journal', 1],
    ['Bulletin of the United States Fish Commission', 1],
    ['Ichthyological Bulletin of the J. L. B. Smith Institute of Ichthyology', 1],
    ['Journal and Proceedings of the Asiatic Society of Bengal', 1],
    ['Marine Investigations in South Africa', 1],
    ['Natuurkunde Tijdschrift voor Nederlandsche-Indië', 1],
    ['Proceedings of the Zoological Society of London, B', 1],
    ['Report of the Fisheries and Marine Biological Survey, Union of South Africa', 1],
    ['Species Diversity', 2],
    ['Zootaxa', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);