function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adansonia', 44],
    ['Biodiversity Data Journal', 93],
    ['Birkhaeuser Verlag', 112],
    ['Candollea', 66],
    ['Flora Helvetica', 104],
    ['Info Flora Schweiz', 130],
    ['Kew Bulletin', 34],
    ['Laurentius Salvius', 43],
    ['Linzer biologische Beiträge', 20],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 362],
    ['PhytoKeys', 498],
    ['Phytochemistry', 12],
    ['Phytotaxa', 363],
    ['Plant Ecology and Evolution', 27],
    ['Zootaxa', 14],
    ['Other (25)', 67]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=1989)',
    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);