function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annales du Jardin Botanique de Buitenzorg.', 1],
    ['Biodiversity Data Journal', 4],
    ['Denkschriften der Kaiserlichen Akademie der Wissenschaften, Wien. Mathematisch-Naturwissenschaftliche Klasse', 1],
    ['Journal of Botany', 1],
    ['Journal of the Arnold Arboretum', 2],
    ['Kew Bulletin', 4],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 4],
    ['PhytoKeys', 1],
    ['Phytotaxa', 14],
    ['Proceedings of the Royal Society of Queensland', 1],
    ['Zoosystema', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=34)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);