function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['American Museum Novitates', 1],
    ['Bulletin de l\'Akadémie Impériale des Sciences de St. Pétersbourg, 5', 1],
    ['Bulletin de la Société Zoologique de France', 1],
    ['Bulletin of the American Museum of Natural History', 1],
    ['Contr. Biol. Lab. Sci. Soc. China, Zool. Ser.', 1],
    ['Ezhegodnik Zoologicheskogo Muzeya Imperatorskogo Akademii Nauk', 1],
    ['Japanese Journal of Zoology', 1],
    ['Lingnan Science Journal', 1],
    ['Monatsberichte der Akademie der Wissenschaft zu Berlin', 1],
    ['Proceedings of the Biological Society of Washington', 1],
    ['Raffles Bulletin of Zoology', 2],
    ['Thèsis Facult. Sci. Univ. Paris, A', 1],
    ['Trudy St. Petersburg. Obsh. Estestv.', 1],
    ['Turkish Journal of Zoology', 1],
    ['Zootaxa', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=18)',
    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);