function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Botanical Journal of the Linnean Society', 11],
    ['Bothalia', 3],
    ['Data in brief', 30],
    ['Denkschriften der Schweizerischen Naturforschenden Gesellschaft', 7],
    ['Haseltonia', 6],
    ['Info Flora Schweiz', 3],
    ['Journal of Natural History', 5],
    ['Laurentius Salvius', 46],
    ['Linzer biologische Beiträge', 4],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 66],
    ['PhytoKeys', 8],
    ['Phytotaxa', 6],
    ['South African Journal of Botany', 10],
    ['Systematic Botany', 56],
    ['Zoosystema', 6],
    ['Other (6)', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=276)',
    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);