function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boston Journal of Natural History', 3],
    ['Cybium', 2],
    ['Eawag: Swiss Federal Institute of Aquatic Science and Technology', 2],
    ['European Journal of Taxonomy', 1],
    ['Laurentii Salvii', 3],
    ['Laurentius Salvius', 9],
    ['Nouvelles Archives du Muséum d\'Histoire Naturelle, Paris, Série 2', 5],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 2],
    ['Proceedings of the California Academy of Sciences, Series 1', 1],
    ['Proceedings of the United States National Museum, 3', 1],
    ['Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften, Mathematisch-Naturwissenschaften Classe', 1],
    ['The Canadian Naturalist and Geologist', 1],
    ['Trudy St. Petersburg. Obsh. Estestv.', 1],
    ['Turkish Journal of Zoology', 1],
    ['Zootaxa', 4],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=38)',
    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);