function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adansonia', 53],
    ['Biodiversity Data Journal', 1004],
    ['Birkhaeuser Verlag', 302],
    ['Blumea - Biodiversity, Evolution and Biogeography of Plants', 24],
    ['Candollea', 153],
    ['Check List', 53],
    ['Flora Helvetica', 255],
    ['Flora de Colombia', 39],
    ['Info Flora Schweiz', 414],
    ['Laurentius Salvius', 186],
    ['Linzer biologische Beiträge', 222],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 385],
    ['PhytoKeys', 473],
    ['Phytotaxa', 921],
    ['Zootaxa', 76],
    ['Other (58)', 281]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=4841)',
    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);