function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Academiae Scientiarum Imperialis Petropolitanae', 1],
    ['Beverley Tucker', 1],
    ['Cybium', 3],
    ['F. S. Hübschmann, Monachii [= Munich] & Fleischer, Lipsiae [= Leipzig]', 1],
    ['Förh. Skand. Naturf.', 1],
    ['Laurentius Salvius', 2],
    ['Memoirs of the American Academy of Arts and Sciences', 1],
    ['Nederlandsch Tijdschrift voor de Dierkunde', 1],
    ['Proceedings of the Biological Society of Washington', 1],
    ['Proceedings of the United States National Museum, 3', 1],
    ['Z. Zellforsch.', 1],
    ['Zootaxa', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=19)',
    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);