function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Entomologica Musei Nationalis Pragae', 19],
    ['African Invertebrates', 1],
    ['African invertebrates', 2],
    ['Aquatic insects', 3],
    ['Biodiversity Data Journal', 7],
    ['Cretaceous Research', 2],
    ['Far Eastern Entomologist', 3],
    ['Fauna of New Zealand', 27],
    ['Fragmenta Faunistica', 27],
    ['Insecta Mundi', 10],
    ['Journal of Natural History', 4],
    ['Raffles Bulletin of Zoology', 9],
    ['The Coleopterists Bulletin', 2],
    ['ZooKeys', 26],
    ['Zootaxa', 1363],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=1510)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);