function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Entomologica Musei Nationalis Pragae', 56],
    ['Acta Zoologica Academiae Scientiarum Hungaricae', 20],
    ['Belgian journal of entomology', 3],
    ['Biodiversity Data Journal', 4],
    ['European Journal of Taxonomy', 146],
    ['Insecta Mundi', 35],
    ['Journal of Natural History', 4],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 3],
    ['Proceedings of the Entomological Society of Washington', 3],
    ['Proceedings of the Linnean Society of London, Zoology', 14],
    ['U. S. Geolological Survey Wyoming & Contiguous Territories', 1],
    ['ZooKeys', 63],
    ['Zoosystema', 24],
    ['Zootaxa', 170],
    ['Öfversigt af Konglelige Vetenskaps-Akademiens Förhandlingar', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=547)',
    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);