function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Don E. Wilson & Russell A. Mittermeier', 1],
    ['García-Prieto, Luis & Falcón-Ordaz, Jorge', 1],
    ['Hidalgo-Mihart, Mircea G. & Contreras-Moreno, Fernando M.', 1],
    ['James H. Honacki & Kenneth E. Kinman & James W. Koeppl', 3],
    ['Jansen, Martin & Engler, Marc & Blumer, Luka Moritz', 1],
    ['Oliveira, Marcela Alvares & Calouro, Armando Muniz', 1],
    ['Peter Grubb', 2],
    ['Pierre, Meshach A. & Ignacio, Leroy & Paemelaere, Evi A. D.', 1],
    ['Voss, Robert S. & Fleck, David W.', 1],
    ['Wilson, Don E. & Reeder, DeeAnn', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    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);