function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Biologica Universitatis Daugavpiliensis', 1],
    ['Archiv für Naturgeschichte, Abteilung A', 1],
    ['Baltic Journal of Coleopterology', 1],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 1],
    ['Biodiversity Data Journal', 1],
    ['Entomo Helvetica', 1],
    ['Insecta Mundi', 15],
    ['Insects of Guam I', 2],
    ['Linzer biologische Beiträge', 1],
    ['Palaeodiversity', 1],
    ['Revista Chilena de Entomología', 4],
    ['The Coleopterists Bulletin', 4],
    ['ZooKeys', 1],
    ['Zootaxa', 10]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=44)',
    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);