function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annotationes Zoologicae Japonenses', 1],
    ['Comptes Rendus Hebdomadaires des Séances de l\'Académie des Sciences', 1],
    ['European Journal of Taxonomy', 91],
    ['International review of hydrobiology', 1],
    ['Journal of Natural History', 26],
    ['Memoirs of the Museum of Victoria', 1],
    ['Opuscula Zoologica, Budapest', 1],
    ['Soil Organisms', 1],
    ['Species Diversity', 5],
    ['ZooKeys', 30],
    ['Zoological Journal of the Linnean Society', 24],
    ['Zoological Science', 1],
    ['Zoosystema', 4],
    ['Zootaxa', 172]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=359)',
    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);