function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Biologica Universitatis Daugavpiliensis', 8],
    ['Alpine Entomology', 2],
    ['Amurian Zoological Journal', 1],
    ['Biodiversity Data Journal', 1],
    ['Entomo Helvetica', 9],
    ['Insecta Mundi', 26],
    ['Japanese Journal of Systematic Entomology', 4],
    ['Kungliga Svenska Vetenskapsakademiens Handlingar', 1],
    ['Linzer biologische Beiträge', 6],
    ['New Zealand Institute bulletin', 2],
    ['Pacific insects monograph', 1],
    ['Palaeoentomology', 2],
    ['Smithsonian Miscellaneous Collections', 3],
    ['ZooKeys', 12],
    ['Zootaxa', 55]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=133)',
    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);