function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bleeker, Pieter', 1],
    ['Bliss, R.', 1],
    ['Chaudhuri, B. L.', 1],
    ['Herre, Albert W. C. T.', 1],
    ['Ho, Hsuan-Ching & Smith, David G. & Mccosker, John E.', 2],
    ['Marcia Salustiano de Castro & Ana Cristina Teixeira Bonecker', 1],
    ['McCann, Yule Mervyn Charles', 1],
    ['Metzelaar, J.', 1],
    ['Seale, A.', 1],
    ['Smith-Vaniz, William F. & Jelks, Howard L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    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);