function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 1],
    ['Boissiera', 4],
    ['Brill', 11],
    ['Candollea', 17],
    ['Check List', 14],
    ['Cryptogamie, Bryologie', 3],
    ['European Journal of Taxonomy', 6],
    ['Fossil Imprint', 2],
    ['Journal of Natural History', 1],
    ['Kew Publishing', 14],
    ['Magazin für die neuesten Entdeckungen in der gesammten Naturkunde', 7],
    ['Nouveaux Mémoires de l\'Académie Royale des Sciences et des Belles-Lettres de Bruxelles', 1],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 1],
    ['PhytoKeys', 1],
    ['Phytotaxa', 1],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=85)',
    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);