function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Frič, Antonin', 2],
    ['Haase, E.', 1],
    ['Hirst, Stanley', 4],
    ['Jones, Fiona M. & Dunlop, Jason A. & Friedman, Matt', 2],
    ['Kušta, Jan', 3],
    ['Pocock, Reginald Innes', 3],
    ['Pruvost, Patrice', 2],
    ['Scudder, Samuel H.', 3],
    ['Shear, William A. & Selden, Paul A. & Rolfe, W. D. I.', 7],
    ['Stur, Dionys Rudolf Josef', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);