function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['African Journal of Aquatic Science', 1],
    ['Annali del Museo Civico di Storia Naturale \' Giacomo Doria\'', 1],
    ['Annals of the Cape Provincial Museums Natural History', 1],
    ['Aquarien und Terrarien Zeitschrift', 4],
    ['Aquarium Aqua Terra', 1],
    ['Bulletin du Muséum National d’Histoire Naturelle, Série 2', 1],
    ['Deutsche Killifisch Gem. J.', 2],
    ['Ichthyological Exploration of Freshwaters', 4],
    ['Ichthyological exploration of freshwaters', 5],
    ['Journal of Natural History', 2],
    ['Killi-Data Editions', 2],
    ['Revue Zoologique Africaine', 4],
    ['Zoologischer Anzeiger', 3],
    ['Zoosystematics and Evolution', 2],
    ['Zootaxa', 13],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=51)',
    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);