function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cope, Edward Drinker', 1],
    ['Dybowski, B. I.', 1],
    ['Fitzinger, Leopold Joseph Franz Johann', 1],
    ['Gistel, Johannes von Nepomuk Franz Xaver', 1],
    ['Herzenstein, S. M.', 1],
    ['Kessler, K. T.', 1],
    ['Milner, J. W.', 1],
    ['Perty, Josef Anton Maximilian Prof. Dr.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=8)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);