function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adansonia: Recueil d\'Observations Botaniques', 18],
    ['Biodiversity Data Journal', 75],
    ['Birkhaeuser Verlag', 166],
    ['Botanische Jahrbücher fur Systematik, Pflanzengeschichte und Pflanzengeographie.', 48],
    ['Candollea', 51],
    ['Denkschriften der Schweizerischen Naturforschenden Gesellschaft', 54],
    ['Flora Helvetica', 113],
    ['Info Flora Schweiz', 161],
    ['Laurentius Salvius', 187],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 258],
    ['PhytoKeys', 44],
    ['Phytochemistry', 13],
    ['Phytotaxa', 227],
    ['Zoological Journal of the Linnean Society', 18],
    ['Zootaxa', 17],
    ['Other (41)', 143]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=1593)',
    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);