function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Biologica Sibirica', 1],
    ['Acta Entomologica Musei Nationalis Pragae', 1],
    ['African Invertebrates', 4],
    ['Annali del Museo Civico di Storia Naturale di Genova', 1],
    ['Biodiversity Data Journal', 3],
    ['Far Eastern Entomologist', 10],
    ['Japanese Journal of Systematic Entomology', 1],
    ['Journal of Natural History', 5],
    ['Linzer biologische Beiträge', 2],
    ['Records of the Zoological Survey of India', 3],
    ['Revue suisse de Zoologie', 3],
    ['The Orthopterists Society at the Academy of Natural Sciences of Philadelphia,', 7],
    ['Umwelt-Vollzug', 3],
    ['Zoosystema', 6],
    ['Zootaxa', 123]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=173)',
    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);