function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arens, W.', 6],
    ['Blackburn, T. & Cameron, P.', 8],
    ['Blackburn, T. & Kirby, William Forsell', 2],
    ['Carpenter, James M.', 23],
    ['Carpenter, James M. & Brown, Graham R.', 3],
    ['Dalla Torre, K. W. v.', 3],
    ['Else, George R. & Bolton, Barry & Broad, Gavin R.', 8],
    ['Fateryga, Alexander V. & Proshchalykin, Maxim Yu.', 5],
    ['Gusenleitner, J.', 53],
    ['J. M & Gusenleitner, J. & Madl, M.', 84],
    ['J. M & Madl, M.', 10],
    ['Perkins, Robert Cyril Layton', 21],
    ['Usenleitner & Gusenleitner, J. & Madl, M.', 63],
    ['Walker, Francis', 20],
    ['Yildirim, Erol & Gusenleitner, Josef', 3],
    ['Other (13)', 16]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=328)',
    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);