function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adansonia', 234],
    ['Adansonia: Recueil d\'Observations Botaniques', 15],
    ['Biodiversity Data Journal', 41],
    ['Birkhaeuser Verlag', 36],
    ['Candollea', 50],
    ['European Journal of Taxonomy', 110],
    ['Flora Helvetica', 29],
    ['Info Flora Schweiz', 38],
    ['Journal of the Arnold Arboretum', 27],
    ['Kew Bulletin', 95],
    ['Laurentius Salvius', 60],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 143],
    ['PhytoKeys', 224],
    ['Phytotaxa', 299],
    ['Zootaxa', 48],
    ['Other (29)', 131]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=1580)',
    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);