function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A. Gosohorsky', 1],
    ['Annales Societe Entomologique France', 6],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 5],
    ['J. Frank', 1],
    ['Leopold Voss', 4],
    ['Memoires. Societe des Sciences de Liège', 1],
    ['Mich. Friedr. Bartsch', 1],
    ['Opuscoli Scientifici, Bologna', 1],
    ['Proceedings of the Royal Entomological Society of London', 3],
    ['Smithsonian Miscellaneous Collections', 2],
    ['Supplementum Entomologiae systematicae', 4],
    ['Transactions of the Entomological Society of London', 4],
    ['Wiener Entomologische Monatschrift', 8],
    ['Zoologisches Magazin', 1],
    ['Zoologisches Magazin Wiedemann', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=44)',
    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);