function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arthropoda Selecta', 1],
    ['Biodiversity Data Journal', 9],
    ['Caucasian Entomological Bulletin', 1],
    ['European Journal of Taxonomy', 3],
    ['Evolutionary Systematics', 1],
    ['Journal of Arachnology', 1],
    ['Mitt. Abt. Zool. Landesmus. Joanneum', 3],
    ['Pacific insects monograph', 1],
    ['ZooKeys', 3],
    ['Zoological Systematics', 2],
    ['Zoology in the Middle East', 2],
    ['Zoosystema', 1],
    ['Zootaxa', 24]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=52)',
    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);