function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Journal Pan-Pac. Res. Inst.', 1],
    ['Mémoires de l\'Académie des Sciences de St. Pétersbourg', 3],
    ['Mémoires de l\'Académie des Sciences de St. Pétersbourg, 7', 1],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 3],
    ['Proceedings of the United States National Museum, 3', 2],
    ['The West American Scientist', 1],
    ['Trudy Otdela Ichtiol. Russ. Obsc. Akklimat. Zhiv. Moskva.', 1],
    ['Verslagen en Mededeelingen der Koninklijke Akademie van Wetenschappen. Afdeeling Natuurkunde', 1],
    ['Zoological Journal of the Linnean Society', 1],
    ['Zootaxa', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);