function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Journal of Parasitology', 1],
    ['Norwegian Journal of Zoology', 1],
    ['Pakistan Journal of Zoology', 1],
    ['Parasitology', 1],
    ['Publicaciones biol Inst Inv cienc UANL', 1],
    ['Publications of the Carnegie Institution of Washington', 1],
    ['Revista de Biologia Tropicale', 1],
    ['Revue suisse de Zoologie', 2],
    ['Servicio de Hidrografía Naval de la Secretaría de la Rep. Argentina', 1],
    ['The American Midland Naturalist', 1],
    ['Transactions of the American Microscopical Society', 1],
    ['Tulane Studies in Zoology', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);