function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A. Constable', 1],
    ['Acta de la Academia Nacional de Ciencias Exactas', 1],
    ['Anales del Museo Nacional de Historia Natural de Buenos Aires, Serie 3', 1],
    ['Anzeiger', 3],
    ['Arquivos do Museu Nacional Rio de Janeiro', 1],
    ['E. J. Brill', 1],
    ['Kungliga Svenska Vetenskapsakademiens Handlingar', 1],
    ['Monatsberichte der Akademie der Wissenschaft zu Berlin', 1],
    ['Natuurkunde Tijdschrift voor Nederlandsche-Indië', 2],
    ['Proceedings of the California Academy of Sciences, Series 4', 1],
    ['Publications of the Field Museum of Natural History, Zoölogical', 1],
    ['University of California Publications in Zoology', 1],
    ['Zoologischer Anzeiger', 1],
    ['Zootaxa', 10]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=26)',
    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);