function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Entomologica Musei Nationalis Pragae', 12],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 1],
    ['Biodiversity Data Journal', 7],
    ['Entomologist\'s monthly magazine', 2],
    ['Folia Entomologica Hungarica', 1],
    ['Insects of Guam II', 2],
    ['Linzer biologische Beiträge', 4],
    ['Raffles Bulletin of Zoology', 7],
    ['The University of Kansas Science Bulletin', 30],
    ['Tijdschrift voor Entomologie', 2],
    ['Yves Gravier', 1],
    ['Zootaxa', 21]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=90)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);