function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['American Journal of Conchology', 1],
    ['Archiv für Molluskenkunde', 1],
    ['Insecta Mundi', 1],
    ['Iwanami Shoten', 3],
    ['Journal of Species Research', 1],
    ['Journal of the Ceylon Branch of the Royal Asiatic Society', 3],
    ['Proceedings of the Boston Society of Natural History', 2],
    ['Proceedings of the Zoological Society of London', 6],
    ['Raffles Bulletin of Zoology', 5],
    ['Records of the Auckland Institute and Museum', 2],
    ['Revista de la Academia Canaria de Ciencias', 1],
    ['ZooKeys', 13],
    ['Zoological Journal of the Linnean Society', 1],
    ['Zoosystema', 1],
    ['Zootaxa', 54]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=95)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);