function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Awad, Jessica & Krogmann, Lars & Talamas, Elijah', 2],
    ['Buhl, Peter N. & Broad, Gavin R. & Notton, David G.', 6],
    ['Buhl, Peter N. & Notton, David G.', 2],
    ['Madl, Michael & H, Inostemma & F, Leptacis & L, Platygaster', 1],
    ['Montes-Rodríguez, José Mauricio & Kondo, Takumasa', 1],
    ['Notton, David G.', 3],
    ['van Noort, Simon & Lahey, Zachary & Talamas, Elijah J.', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);