function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['De Carvalho, Marcelo R. & Ebert, David A. & Ho, Hsuan-Ching', 1],
    ['Ebert, David A. & White, William T. & Ho, Hsuan-Ching', 1],
    ['Ebert, David A. & Wilms, Hana A.', 2],
    ['Ebert, David A. & Wintner, Sabine P. & Kyne, Peter M.', 2],
    ['Laan, Richard Van Der & Eschmeyer, William N. & Fricke, Ronald', 1],
    ['Regan, C. T.', 1],
    ['Springer, S. & Bullis, H. R.', 1],
    ['Weigmann, Simon & Gon, Ofer & Leeney, Ruth H.', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);