function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['European Journal of Taxonomy', 1],
    ['Geo-Pal Uganda', 6],
    ['Journal d\'Histoire Naturelle', 1],
    ['Journal de Physique, de Chimie, d\'Histoire Naturelle et des Arts', 1],
    ['Molecular Phylogenetics and Evolution', 2],
    ['Oversigt over det Kongelige Danske Videnskabernes Selskabs Forhandlinger', 1],
    ['Raffles Bulletin of Zoology', 5],
    ['Renaud', 1],
    ['Schultz', 2],
    ['Scientific Reports', 6],
    ['Transactions of the geological society of London, 2', 4],
    ['Typ. Berlingianis', 2],
    ['Zoological Journal of the Linnean Society', 5],
    ['Zootaxa', 30]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=67)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);