function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Balushkin, A. V.', 6],
    ['Balushkin, A. V. & Stehmann, M.', 1],
    ['Boulenger, George Albert', 7],
    ['Daniels, Robert A.', 1],
    ['DeWitt, H. H.', 2],
    ['Delfin, F. T.', 1],
    ['Fischer, J. G.', 2],
    ['Günther, Albert Charles Lewis Gotthilf', 3],
    ['Haast, J. F. J. von', 1],
    ['Kuzmina, T. A. & Salganskiy, O. O. & Vishnyakova, K. O.', 4],
    ['Lönnberg, A. J. E.', 3],
    ['Norman, J. R.', 2],
    ['Peters, Wilhelm Carl Hartwig', 2],
    ['Regan, C. T.', 2],
    ['Richardson, John', 3],
    ['Other (9)', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=49)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);