function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anales de la Sociedad Española de Historia Natural', 1],
    ['Anzeiger', 1],
    ['Biodiversity Data Journal', 4],
    ['Bollettino dei Musei di Zoologia ed Anatomia Comparata della R. Università di Torino', 1],
    ['Bulletin of the New York Zoological Society', 1],
    ['European Journal of Taxonomy', 2],
    ['Novi Commentarii Academiae Scientiarum Instituti Bononiensis', 2],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 2],
    ['Proceedings of the California Academy of Sciences, Series 4', 1],
    ['Proceedings of the United States National Museum, 3', 2],
    ['Proceedings of the Zoological Society of London, B', 1],
    ['Repertorio Fisico-Natural de la Isla de Cuba', 1],
    ['Transactions of the Zoological Society of London', 1],
    ['Zootaxa', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);