function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Societatis Regiae Scientiarum Indo-Neêrlandicae', 2],
    ['European Journal of Taxonomy', 3],
    ['Journal of the Bombay Natural History Society', 1],
    ['Laurentius Salvius', 2],
    ['Mar. Sci., Beijing', 2],
    ['Marine Sciences', 1],
    ['Mem. Soc. Italiana', 1],
    ['Proceedings of the Linnean Society of New South Wales', 1],
    ['Proceedings of the Zoological Society-Calcutta, Calcutta', 2],
    ['Schweizerbart', 1],
    ['Skrifter Naturhistoriska-Selski. Kiøbenhavn', 1],
    ['Zoological Miscellany', 3],
    ['Zootaxa', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=25)',
    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);