function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 404],
    ['Dugesiana', 6],
    ['Entomologica Americana', 3],
    ['European Journal of Taxonomy', 3],
    ['Insect Systematics and Diversity', 28],
    ['Journal of Hymenoptera Research', 21],
    ['Journal of Natural History', 4],
    ['Laurentius Salvius', 15],
    ['Pacific insects', 9],
    ['ZooKeys', 45],
    ['Zoological Journal of the Linnean Society', 8],
    ['Zoological Systematics', 5],
    ['Zoological studies', 33],
    ['Zoosystema', 18],
    ['Zootaxa', 893],
    ['Other (17)', 21]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=1516)',
    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);