function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amato, J. F. R', 1],
    ['Bray, Rodney A. & Justine, Jean-Lou & Cribb, Thomas H.', 1],
    ['Cribb, Thomas H. & Bray, Rodney A.', 2],
    ['Curran, Stephen S. & Tkach, Vasyl V. & Overstreet, Robin M.', 1],
    ['Dyer, William G. & Williams, E. H. & Bunkley-Williams, Lucy', 1],
    ['Fischthal, Jacob H. & Thomas, J. D.', 1],
    ['Lamothe-Argumedo, R.', 1],
    ['León, Pérez-Ponce De & García-Magaña, Leticia', 2],
    ['Lopes, Daniela A. & Mainenti, Adriana & Knoff, Marcelo', 1],
    ['Lunaschi, Lia I. & Álvarez, Victor Hugo Merlo', 1],
    ['Manter, Harold W.', 1],
    ['Margarita Ostrowski de Núñez & Nathalia J. Arredondo', 2],
    ['Martorelli, S. R.', 1],
    ['Parker, Jessica H. & Curran, Stephen S. & Overstreet, Robin M.', 1],
    ['Siddiqi, Ather H. & Cable, Raymond M.', 1],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);