function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Protozoologica', 5],
    ['Acta Societatis Zoologicae Bohemoslovenicae', 1],
    ['Acta biologica Academiae Scientiarum Hungaricae', 1],
    ['Annales de la Faculte des Sciences du Cameroun', 1],
    ['Boletín de la Real Sociedad Española de Historia Natural', 1],
    ['Decheniana', 1],
    ['European Journal of Protistology', 1],
    ['Hallageriis', 2],
    ['Havniae & Lipsiae', 35],
    ['Journal of Eukaryotic Microbiology', 3],
    ['Journal of Natural History', 4],
    ['N. Mölleri', 1],
    ['Sitzungsberichte, Österreichische Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Klasse', 1],
    ['Zoological Journal of the Linnean Society', 2],
    ['Zootaxa', 32],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=92)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);