function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ehrenbaum, E.', 1],
    ['Fowler, Henry Weed', 1],
    ['Garman, S.', 3],
    ['Haacke, W.', 1],
    ['Jordan, David Starr & Rutter, C.', 1],
    ['Macleay, William John', 1],
    ['Müller, J. & Henle, F. G. J.', 7],
    ['Norman, J. R.', 3],
    ['de Blainville, Henri Marie Ducrotay', 2],
    ['de Laporte Castelnau La Ferté-Sénectère, Francis L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);