function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boulenger, George Albert', 8],
    ['David, L. & Poll, M.', 1],
    ['Fowler, Henry Weed', 2],
    ['Gill, T. N.', 1],
    ['Kramer, Bernd & Skelton, Paul & Bank, Herman Van Der', 9],
    ['Kramer, Bernd & Wink, Michael', 6],
    ['Kramer, Bernd & van der Bank, F. Herman & Wink, Michael', 1],
    ['Maake, Pholoshi A. & Gon, Ofer & Swartz, Ernst R.', 5],
    ['Määr, A.', 1],
    ['Nichols, J. T. & Griscom, L.', 2],
    ['Pellegrin, J.', 2],
    ['Svensson, G. S. O.', 1],
    ['Taverne, L. & Thys van den Audenaerde, D. F. E. & Heymer, A.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=41)',
    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);