function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Algemeene Konst- en Letter-Bode', 1],
    ['Arnoldia', 1],
    ['Biodiversity Data Journal', 1],
    ['Bulletin du Musée Royal d\'Histoire Naturelle de Belgique', 1],
    ['Bulletin du Muséum National d’Histoire Naturelle, Série 2', 1],
    ['Cimbebasia', 1],
    ['European Journal of Taxonomy', 3],
    ['Ichthyological Exploration of Freshwaters', 1],
    ['Mem. Acad. R. Belg. Cl. Sci., B', 5],
    ['Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut', 1],
    ['Publicacoes Culturais da Companhia de Diamantes Angola', 2],
    ['Revue Zoologique Africaine', 2],
    ['Revue de Zoologie et de Botanique Africaines', 2],
    ['Zoological Journal of the Linnean Society', 2],
    ['Zootaxa', 16],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=46)',
    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);