function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Balushkin, A. V. & Trunov, L. A.', 1],
    ['Beebe, W. & Crane, J.', 1],
    ['Bertelsen, E.', 3],
    ['Carneiro, Miguel & Martins, Rogélia & Landi, Monica', 8],
    ['Ho, Hsuan-Ching & Kawai, Toshio & Amaoka, Kunio', 1],
    ['Imai, Sadahiko', 1],
    ['Love, Milton S. & Bizzarro, Joseph J. & Cornthwaite, Maria', 2],
    ['Maul, G. E.', 1],
    ['Parr, A. E.', 3],
    ['Regan, C. T.', 1],
    ['Regan, C. T. & Trewavas, E.', 4],
    ['Waterman, T. H.', 1],
    ['Weber, M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);