function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Entomologica Musei Nationalis Pragae', 18],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 1],
    ['Biodiversity Data Journal', 2],
    ['C. G. Proft, Fil. et Soc.', 1],
    ['Check List', 2],
    ['Christ. Gottl. Proft', 1],
    ['Edinburgh encyclopaedia, conducted by David Brewster', 1],
    ['Entomologist\'s monthly magazine', 1],
    ['European Journal of Taxonomy', 50],
    ['Journal of Natural History', 5],
    ['Linzer biologische Beiträge', 15],
    ['Mich. Friedr. Bartsch', 1],
    ['Tijdschrift voor Entomologie', 4],
    ['Zoosystema', 2],
    ['Zootaxa', 248],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=354)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);