function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acarologia', 55],
    ['Acta Parasitologia', 1],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 2],
    ['Bull. British Mus. nat. Hist., Zool. ser.', 1],
    ['Insecta Mundi', 2],
    ['Laurentius Salvius', 33],
    ['Mem. Soc Zool Fr', 1],
    ['Nature Communications', 1],
    ['Pan-Pac Ent', 1],
    ['Parasites & Vectors', 1],
    ['Parasitology Open', 1],
    ['Persian Journal of Acarology', 53],
    ['ZooKeys', 3],
    ['Zoological Systematics', 5],
    ['Zootaxa', 1741],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=1907)',
    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);