function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annals Transvaal Museum', 1],
    ['Annals of the South African Museum [Annale van die Suid-Afrikaanse Museum]', 1],
    ['Australian Journal of Entomology', 2],
    ['Geodiversitas', 2],
    ['J. Aust. ent. Soc.', 2],
    ['Odonatologica', 1],
    ['Oriental Insects', 1],
    ['Psyche', 3],
    ['Systematic Entomology', 8],
    ['Transactions Entomological Society London', 2],
    ['Zootaxa', 19]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=42)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);