function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bray, Rodney A. & Gibson, David Ian', 1],
    ['Durio, Walter O. & Manter, Harold W.', 1],
    ['Fischthal, Jacob H.', 2],
    ['Gaevskaya, A. V. & Kovaleva, A. A.', 1],
    ['Jezewski, Witold & Zdzitowiecki, Krzysztof & Laskowski, Zdzisław', 1],
    ['Korotaeva, V. D.', 1],
    ['Machida, Masaaki', 2],
    ['Manter, Harold W.', 2],
    ['Montgomery, William R.', 1],
    ['Nahhas, Fuad M. & Cable, Raymond M.', 1],
    ['Overstreet, Robin M.', 1],
    ['Prudhoe, S. & Bray, Rodney A.', 4],
    ['Ramadan, M. M.', 1],
    ['Siddiqi, Ather H. & Cable, Raymond M.', 4],
    ['Zdzitowiecki, Krzysztof', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);