function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Forel, A.', 1],
    ['Guénard, Benoit & Mccaffrey, Katherine A. & Lucky, Andrea', 1],
    ['Kempf, W. W.', 2],
    ['Mayhé-Nunes, A. J. & Brandão, C. R. F.', 9],
    ['Mayhé-Nunes, Antonio J. & Brandão, Roberto F.', 9],
    ['Neal A. Weber, University of North Dakota', 4],
    ['Rabeling, Ch. & Cover, S. P. & Johnson, R. A. & Mueller, U. G.', 11],
    ['Rabeling, Christian & Cover, Stefan P. & Johnson, Robert A.', 10],
    ['Sanchez-Pena, Sergio R. & Chacon-Cardosa, Manuela Citlali', 1],
    ['Wild, A. L.', 11],
    ['Wild, Alexander L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=60)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);