function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Entomologica Musei Nationalis Pragae', 10],
    ['African Invertebrates', 1],
    ['Alpine Entomology', 1],
    ['Biodiversity Data Journal', 3],
    ['Entomo Helvetica', 1],
    ['European Journal of Taxonomy', 4],
    ['Fragmenta Faunistica', 2],
    ['Insecta Mundi', 7],
    ['Journal of Natural History', 70],
    ['Occasional Papers of the Bernice P. Bishop Museum', 1],
    ['ZooKeys', 3],
    ['Zoosystema', 3],
    ['Zootaxa', 70]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=176)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);