function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alleyne, H. G. & Macleay, William John', 1],
    ['Andréfouët, Serge & Chen, Wei-Jen & Kinch, Jeff & Mana, Ralph', 2],
    ['Bleeker, Pieter', 6],
    ['Esmaeili, Hamid Reza & Hamidan, Neshat', 1],
    ['Esmaeili, Hamid Reza & Jufaili, Saud Al & Masoumi, Amir Hassan', 1],
    ['Gilchrist, J. D. F. & Thompson, W. Wardlaw', 1],
    ['Günther, Albert Charles Lewis Gotthilf', 1],
    ['Jerdon, T. C.', 1],
    ['Klunzinger, C. B.', 1],
    ['McClelland, J.', 1],
    ['Morgan, David L. & Allen, Gerald R. & Pusey, Bradley J.', 3],
    ['Pellegrin, J.', 1],
    ['Ramsay, E. P. & Ogilby, J. D.', 1],
    ['Steindachner, F.', 2],
    ['Zainal Abidin, Danial Hariz & Lavoué, Sébastien', 3],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    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);