function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adansonia', 3],
    ['Check List', 2],
    ['Journal of the Arnold Arboretum', 10],
    ['Laurentius Salvius', 2],
    ['Nova Guinea. Contributions to the anthropology, botany, geology and zoology of the Papuan region. Botany', 6],
    ['Nova Guinea: a journal of botany, zoology, anthropology, ethnography, geology and palaeontology of the Papuan region.', 3],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 1],
    ['PhytoKeys', 4],
    ['Phytotaxa', 1],
    ['Queensland Agricultural Journal', 1],
    ['Taylor & Francis', 1],
    ['Transactions of the Linnean Society of London, Second Series. Botany', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=38)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);