function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adansonia', 5],
    ['Australian Systematic Botany', 4],
    ['Blumea - Biodiversity, Evolution and Biogeography of Plants', 4],
    ['Botanische Jahrbücher fur Systematik, Pflanzengeschichte und Pflanzengeographie.', 29],
    ['Bothalia', 2],
    ['Candollea', 7],
    ['Hooker\'s Journal of Botany and Kew Garden Miscellany', 2],
    ['Laurentius Salvius', 16],
    ['Linzer biologische Beiträge', 10],
    ['Muelleria', 6],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 47],
    ['Phytochemistry', 6],
    ['Phytotaxa', 4],
    ['Zoosystema', 3],
    ['Zootaxa', 6],
    ['Other (11)', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=163)',
    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);