function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Zoologica Academiae Scientiarum Hungaricae', 1],
    ['Annale van die Suid-Afrikaanse Museum [Annals of the South African Museum]', 3],
    ['Annalen des Naturhistorischen Museums in Wien, Serie B, Botanik und Zoologie', 1],
    ['Annotationes Zoologicae Japonenses', 1],
    ['BMC Zooloy', 3],
    ['Bulletin of the British Museum (Natural History), Zoology Series', 1],
    ['Dobutsugaku Zasshi', 1],
    ['Ecologica Montenegrina', 4],
    ['Invertebrate systematics', 1],
    ['Journal of Natural History', 4],
    ['Laurentius Salvius', 9],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 2],
    ['Revue Roumaine de Biologie Serie de Zoologie', 2],
    ['ZooKeys', 2],
    ['Zootaxa', 9],
    ['Other (13)', 13]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=57)',
    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);