function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adansonia', 133],
    ['Annals of Botany', 103],
    ['Biodiversity Data Journal', 171],
    ['Birkhaeuser Verlag', 264],
    ['Botanische Jahrbücher fur Systematik, Pflanzengeschichte und Pflanzengeographie.', 67],
    ['Candollea', 60],
    ['Denkschriften der Schweizerischen Naturforschenden Gesellschaft', 284],
    ['Flora Europaea, Volume 2, Rosaceae to Umbelliferae', 62],
    ['Flora Helvetica', 198],
    ['Info Flora Schweiz', 417],
    ['Laurentius Salvius', 182],
    ['Linzer biologische Beiträge', 61],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 328],
    ['PhytoKeys', 245],
    ['Phytotaxa', 477],
    ['Other (55)', 460]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=3512)',
    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);