function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aquaria, St Gallen', 15],
    ['Aquarien und Terrarien Zeitschrift', 11],
    ['Aquarienfreund', 3],
    ['Assoc. Killiphile Francophone Belge, Killi Contact', 4],
    ['Deutsche Killifisch Gem. J.', 4],
    ['European Journal of Taxonomy', 7],
    ['Ichthyological Exploration of Freshwaters', 6],
    ['Ichthyological exploration of freshwaters', 5],
    ['Revue Zoologique Africaine', 4],
    ['Revue de Zoologie et de Botanique Africaines', 5],
    ['Revue française d\'Aquariologie Herpétologie', 5],
    ['Tropical Fish Hobbyist', 4],
    ['Zoological Journal of the Linnean Society', 5],
    ['Zoologischer Anzeiger', 4],
    ['Zootaxa', 53],
    ['Other (30)', 41]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=176)',
    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);