function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Don E. Wilson & Russell A. Mittermeier', 2],
    ['García-Prieto, Luis & Falcón-Ordaz, Jorge', 2],
    ['Hidalgo-Mihart, Mircea G. & Contreras-Moreno, Fernando M.', 1],
    ['James H. Honacki & Kenneth E. Kinman & James W. Koeppl', 3],
    ['O\'Leary, Maureen A.', 1],
    ['O’Leary, Maureen A.', 1],
    ['Peter Grubb', 3],
    ['VOSS, ROBERT S.', 1],
    ['Wilson, Don E. & Reeder, DeeAnn', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);