function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amori, Giovanni & Segniagbeto, Gabriel Hoinsoude & Decher, Jan', 1],
    ['Don E. Wilson & Russell A. Mittermeier', 11],
    ['Gagnaison, Cyril & Guevel, Bruno & Xerri, Serge', 1],
    ['Groves, C. P. & Meijaard, E.', 4],
    ['James H. Honacki & Kenneth E. Kinman & James W. Koeppl', 7],
    ['Kostopoulos, Dimitris S. & Sen, Sevket', 2],
    ['Meijaard, E. & Groves, C. P.', 4],
    ['O\'Leary, Maureen A.', 1],
    ['Pallas, Peter Simon', 1],
    ['Peter Grubb', 7],
    ['Wilson, Don E. & Reeder, DeeAnn', 20]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=59)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);