function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Clouse, Ronald M. & Wheeler, Ward C.', 3],
    ['Giribet, Gonzalo & Benavides, Ligia & Merino Sáinz, Izaskun', 5],
    ['Karaman, Ivo & Lienhard, Andrea & Niklos, Kathrin', 3],
    ['Karaman, Ivo M.', 4],
    ['Karaman, Ivo M. & Mitov, Plamen G. & Snegovaya, Nataly', 8],
    ['Modebadze, Naia & Martens, Jochen & Snegovaya, Nataly', 1],
    ['Murienne, Jérôme & Giribet, Gonzalo', 6],
    ['Novak, Tone & Giribet, Gonzalo', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    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);