function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A. Constable', 1],
    ['Acta Biologica Venezuelica', 1],
    ['Annalen des K. K. Naturhistorischen Hofmuseums in Wien', 1],
    ['Annals of the Carnegie Museum', 1],
    ['Anzeiger', 1],
    ['Biodiversity Data Journal', 4],
    ['Denkschriften der Kaiserlichen Akademie der Wissenschaften, Wien', 2],
    ['Neotropical Ichthyology', 5],
    ['Not. Mus. Cienc. Nat. Chaco', 2],
    ['Proceedings of the California Academy of Sciences, Series 2', 1],
    ['Proceedings of the Zoological Society of London, B', 1],
    ['Revista da Sociadade Brasileira de Sciências de Rio de Janeiro', 1],
    ['Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften, Mathematisch-Naturwissenschaften Classe', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=22)',
    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);