function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anzeiger', 1],
    ['Bulletin Inst. Oceanogr. Fish.', 1],
    ['Bulletin of the American Museum of Natural History', 1],
    ['Colonial Museum and Geological Survey Department', 1],
    ['European Journal of Taxonomy', 3],
    ['F. Schoell', 1],
    ['Journal of Natural History', 2],
    ['Nederlandsch Tijdschrift voor de Dierkunde', 1],
    ['Proceedings of the California Academy of Sciences, Series 1', 1],
    ['Records of the Australian Museum', 2],
    ['Revista de Biologia Marina.', 1],
    ['Salviucci', 1],
    ['Whittaker', 1],
    ['Zootaxa', 34]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=51)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);