function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adansonia', 2],
    ['Biodiversity Data Journal', 11],
    ['Birkhaeuser Verlag', 34],
    ['Denkschriften der Schweizerischen Naturforschenden Gesellschaft', 21],
    ['Flora Helvetica', 34],
    ['Info Flora Schweiz', 41],
    ['J. Cramer', 2],
    ['Kew Bulletin', 2],
    ['Laurentius Salvius', 23],
    ['Nova Guinea. Contributions to the anthropology, botany, geology and zoology of the Papuan region. Botany', 1],
    ['Nova Guinea: a journal of botany, zoology, anthropology, ethnography, geology and palaeontology of the Papuan region.', 11],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 15],
    ['Phytochemistry', 8],
    ['Phytotaxa', 5],
    ['Transactions of the Linnean Society of London, Second Series. Botany', 2],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=213)',
    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);