function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 6],
    ['CHIRONOMUS Journal of Chironomidae Research', 1],
    ['Comparative Cytogenetics', 6],
    ['Far Eastern Entomologist', 2],
    ['Faunus (Gistel\'s)', 1],
    ['Insects of Guam II', 2],
    ['Journal of Natural History', 2],
    ['Magazin fu ̈ r insektenkunde / herausgegeben von Karl Illiger', 1],
    ['New Zealand Journal of Zoology', 1],
    ['Philippine Journal of Science, Section D', 1],
    ['Proc Linn Soc N S W', 1],
    ['Raffles Bulletin of Zoology', 1],
    ['West, Newman, & Co', 1],
    ['ZooKeys', 1],
    ['Zootaxa', 70]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=97)',
    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);