function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Burckhardt, Daniel', 2],
    ['Cho, Geonho & Burckhardt, Daniel & Lee, Seunghwan', 2],
    ['DROHOJOWSKA, Jowita & KLASA, Anna', 1],
    ['Froggatt, Walter Wilson', 9],
    ['Halbert, Susan E. & Burckhardt, Daniel', 3],
    ['Inoue, Hiromitsu', 12],
    ['Luo, Xinyu & Li, Qiang & Li, Fasheng & Cai, Wanzhi', 1],
    ['Maskell, William Miles', 1],
    ['Ouvrard, David & Burckhardt, Daniel & Cocquempot, Christian', 4],
    ['Percy, Diana M. & Rung, Alessandra & Hoddle, Mark S.', 4],
    ['Tuthill, Leonard D.', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=45)',
    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);