function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baur, Hannes & Kranz-Baltensperger, Yvonne & Cruaud, Astrid', 3],
    ['Dale-Skey, Natalie & Askew, Richard R. & Noyes, John S.', 4],
    ['Mistletoe, Insects Associated With The European & Album, Viscum', 1],
    ['Pérez-Benavides, A. Lucía & Hernández-Baz, Fernando', 3],
    ['Ruschka, F.', 1],
    ['Sureshan, P. M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);