function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bezerra, Alexandra M. R. & Marinho-Filho, Jader', 1],
    ['Dickerman, R. W. & Koopman, K. F. & Seymour, C.', 1],
    ['Don E. Wilson & Russell A. Mittermeier', 11],
    ['García-Prieto, Luis & Falcón-Ordaz, Jorge', 1],
    ['Gutierrez, Eliecer E. & Marinho-Filho, Jader', 1],
    ['James H. Honacki & Kenneth E. Kinman & James W. Koeppl', 11],
    ['Karl F. Koopman', 11],
    ['Siles, Lizette & Baker, Robert J.', 6],
    ['Simmons, Nancy B. & Voss, Robert S.', 8],
    ['Velazco, Paúl M. & Voss, Robert S. & Fleck, David W.', 7],
    ['Wilson, Don E. & Reeder, DeeAnn', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=70)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);