function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 29],
    ['Birkhaeuser Verlag', 38],
    ['Candollea', 52],
    ['Denkschriften der Schweizerischen Naturforschenden Gesellschaft', 34],
    ['Flora Australiensis', 16],
    ['Flora Helvetica', 47],
    ['Flora Nordica', 66],
    ['Info Flora Schweiz', 57],
    ['Laurentius Salvius', 70],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 148],
    ['PhytoKeys', 13],
    ['Phytotaxa', 239],
    ['Taxon', 36],
    ['Transactions of the Natural History Society of Northumberland, Durham, and Newcastle-upon-Tyne', 13],
    ['Zootaxa', 21],
    ['Other (30)', 75]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=954)',
    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);