function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Zoologica Sinica', 1],
    ['Allan Hancock Pacific Expeditions', 1],
    ['Annales de Parasitologie Humaine et Comparée', 2],
    ['Boletin de la Sociedad de Biologia de Concepción', 1],
    ['Bulletin of the Japanese Society of Scientific Fisheries', 1],
    ['Japanese Journal of Zoology', 1],
    ['Keigaku Publishing Company', 1],
    ['Scientific Survey of Porto Rico and the Virgin Islands', 2],
    ['Veterinary Medical Journal, Giza', 1],
    ['Wuyi Science Journal', 2],
    ['Zeitschrift für Parasitenkunde', 2],
    ['Zoologischer Anzeiger', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=16)',
    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);