function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cheek, Martin & Jebb, Matthew', 7],
    ['Dancak, Martin & Majesky, Ľubos & Cermak, Vaclav', 1],
    ['Danser, Benedictus Hubertus', 1],
    ['Jarvis, Charlie', 1],
    ['Jebb, Matthew & Cheek, Martin Roy', 2],
    ['Lagunday, Noel E. & Rosa, Sherolai Dela', 1],
    ['Macfarlane, John Muirhead', 2],
    ['Ridley, Henry Nicholas', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);