function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Entomologica Musei Nationalis Pragae', 1],
    ['Biodiversity Data Journal', 5],
    ['Birkhaeuser Verlag', 3],
    ['Botanica Marina', 1],
    ['Bulletin of the American Museum of Natural History', 3],
    ['Candollea', 1],
    ['Check List', 1],
    ['Cryptogamie, Mycologie', 2],
    ['European Journal of Taxonomy', 6],
    ['Handbook of the Mammals of the World – Volume 4 Sea Mammals', 4],
    ['MycoKeys', 11],
    ['Phytotaxa', 52],
    ['Reimer', 1],
    ['Zoosystema', 8],
    ['Zootaxa', 8],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=108)',
    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);