function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Entomologica Musei Nationalis Pragae', 53],
    ['Biodiversity Data Journal', 1],
    ['European Journal of Taxonomy', 36],
    ['Far Eastern Entomologist', 6],
    ['Insecta Mundi', 8],
    ['Journal of Natural History', 19],
    ['Laurentii Salvii', 1],
    ['Méquignon-Marvis', 2],
    ['Neotropical Biodiversity', 1],
    ['Proceedings of the American Philosophical Society', 1],
    ['Proft et Storch', 2],
    ['The Coleopterists Bulletin', 20],
    ['ZooKeys', 81],
    ['Zootaxa', 290]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=521)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);