function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annale van die Suid-Afrikaanse Museum [Annals of the South African Museum]', 2],
    ['Archiv für Naturgeschichte', 1],
    ['Arquivos do Museu Nacional Rio de Janeiro', 1],
    ['Australian zoologist', 3],
    ['Bulletin of Marine Science', 2],
    ['European Journal of Taxonomy', 9],
    ['Journal Imp. Fish. Inst. Tokyo', 5],
    ['Journal of Natural History', 2],
    ['Laurentius Salvius', 9],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 2],
    ['Proceedings of the Biological Society of Washington', 2],
    ['Proceedings of the United States National Museum, 3', 5],
    ['Raffles Bulletin of Zoology', 9],
    ['Zoological Research', 2],
    ['Zootaxa', 55],
    ['Other (30)', 30]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=139)',
    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);