function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bulletin of entomological research', 1],
    ['Canadian Entomologist', 1],
    ['European Journal of Taxonomy', 43],
    ['Gardeners\' chronicle', 2],
    ['Graellsia', 3],
    ['Insect Systematics and Diversity', 2],
    ['Insecta Mundi', 7],
    ['Insects of Guam I', 3],
    ['Laurentius Salvius', 26],
    ['Proceedings of the Entomological Society of Washington', 3],
    ['Raffles Bulletin of Zoology', 7],
    ['The Entomologist', 2],
    ['Tijdschrift voor Entomologie', 7],
    ['Zoological Journal of the Linnean Society', 4],
    ['Zootaxa', 449],
    ['Other (9)', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=569)',
    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);