function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Biologica Universitatis Daugavpiliensis', 4],
    ['African Entomology', 1],
    ['Annali del Museo Civico di Storia Naturale \' Giacomo Doria\'', 1],
    ['Arquivos entomolóxicos', 1],
    ['Far Eastern Entomologist', 3],
    ['Genus', 4],
    ['Insecta Mundi', 2],
    ['Linzer biologische Beiträge', 4],
    ['Studies and Reports, Taxonomical Series', 5],
    ['Studies and reports of District Museum Prague-East, Taxonomical Series', 1],
    ['The Scientific Transactions of the Royal Dublin Society, Series 2', 1],
    ['ZooKeys', 12],
    ['Zootaxa', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=48)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);