function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adansonia', 63],
    ['Australian Journal of Botany. Supplementary series', 1],
    ['Biodiversity Data Journal', 1],
    ['Blumea - Biodiversity, Evolution and Biogeography of Plants', 2],
    ['Botanische Jahrbücher fur Systematik, Pflanzengeschichte und Pflanzengeographie.', 30],
    ['Candollea', 12],
    ['Edinburgh Journal of Botany', 4],
    ['Harvard Papers in Botany', 5],
    ['Journal of the Arnold Arboretum', 19],
    ['Notizblatt des Königlichen Botanischen Gartens und Museums zu Berlin', 1],
    ['Nova Guinea. Contributions to the anthropology, botany, geology and zoology of the Papuan region. Botany', 7],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 7],
    ['PhytoKeys', 11],
    ['Phytotaxa', 9],
    ['Zoosystema', 3],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=177)',
    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);