function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 3686],
    ['Birkhaeuser Verlag', 942],
    ['Bulletin of the American Museum of Natural History', 1481],
    ['European Journal of Taxonomy', 2674],
    ['Flora Helvetica', 700],
    ['Info Flora Schweiz', 1011],
    ['Journal of Natural History', 1552],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 1933],
    ['PhytoKeys', 873],
    ['Phytotaxa', 5470],
    ['ZooKeys', 5704],
    ['Zoological Journal of the Linnean Society', 1149],
    ['Zoological Systematics', 781],
    ['Zoosystema', 1453],
    ['Zootaxa', 21860],
    ['Other (1003)', 18192]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=69461)',
    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);