function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['African Invertebrates', 25],
    ['African invertebrates', 2],
    ['Arthropod fauna of the UAE', 1],
    ['Biodiversity Data Journal', 24],
    ['Bulletin of the British Arachnological Society', 2],
    ['Caucasian Entomological Bulletin', 4],
    ['European Journal of Taxonomy', 3],
    ['Far Eastern Entomologist', 1],
    ['Peckhamia', 1],
    ['Revue suisse de Zoologie', 1],
    ['Zoosystema', 16],
    ['Zootaxa', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=83)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);