function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin', 2],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 1],
    ['Archiv für Protistenkunde', 1],
    ['Buletin stiintific. Academia republicii populare romine. Sectia de biologie si stiinte agricole., Seria Zoologie', 1],
    ['Comunicarile Academiei Republicii Populare Romine', 1],
    ['Denisia', 1],
    ['Mitteilungen aus der Zoologischen Station zu Neapel', 1],
    ['Proceedings of the American Philosophical Society', 2],
    ['Studii si cercetari Biologie, Seria Biologie animala', 1],
    ['The American Monthly Microscopical Journal', 1],
    ['Trudy Zoologicheskogo Instituta Akademii Nauk SSSR. [Proc. Zool. Inst. Acad. Sci.]', 1],
    ['Wilhelm Engelmann', 2],
    ['Zoology Publications from Victoria University College', 1],
    ['Zootaxa', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);