function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['ANNALES de SPÉLÉOLOGIE', 2],
    ['Annales historico-naturales Musei nationalis hungarici', 2],
    ['Biodiversity Data Journal', 10],
    ['Bulletin de la Societe Vaudoise des Sciences Naturelles', 1],
    ['Ergebnisse der wissenschaftlichen Untersuchung des schweizerisehen Nationalparks', 3],
    ['European Journal of Taxonomy', 10],
    ['Journal of Natural History', 8],
    ['Journal of Plant Protection', 1],
    ['Mededelingen Landbouwhogeschool Wageningen', 2],
    ['Pakistan Journal of Nematology', 1],
    ['Verslagen en Mededelingen Plantenziektenkundige Dienst Wageningen', 1],
    ['ZooKeys', 1],
    ['Zootaxa', 13],
    ['Állattani közlemények', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=56)',
    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);