function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bijdragen tot de Flora van Nederlandsch Indie', 2],
    ['Biodiversity Data Journal', 1],
    ['Botanische Jahrbücher fur Systematik, Pflanzengeschichte und Pflanzengeographie.', 8],
    ['Das Pflanzenreich: regni vegetablilis conspectus / herausgegeben von A. Engler.', 1],
    ['Denkschriften der Kaiserlichen Akademie der Wissenschaften, Wien. Mathematisch-Naturwissenschaftliche Klasse', 2],
    ['Harvard Papers in Botany', 1],
    ['Iwanami Shoten', 1],
    ['Journal of Botany', 1],
    ['Journal of the Arnold Arboretum', 10],
    ['Kew Bulletin', 1],
    ['Kew Bulletin. Additional series, Additional Series', 2],
    ['Nova Guinea. Contributions to the anthropology, botany, geology and zoology of the Papuan region. Botany', 5],
    ['PhytoKeys', 4],
    ['Phytochemistry', 1],
    ['Reports of Science Research Voyage of H. M. S. Challenger. Zoology', 4],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=47)',
    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);