function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bezerra, Alexandra M. R. & Marinho-Filho, Jader', 1],
    ['Camacho, M. Alejandra & Chávez, Daniel & Burneo, Santiago F.', 1],
    ['Don E. Wilson & Russell A. Mittermeier', 7],
    ['Velazco, Paúl M. & Cadenillas, Richard', 1],
    ['Velazco, Paúl M. & Patterson, Bruce D.', 1],
    ['Velazco, Paúl M. & Voss, Robert S. & Fleck, David W.', 4],
    ['Verde, Rair Sousa & Ferreira Oliveira, Sidney', 1],
    ['Wilson, Don E. & Reeder, DeeAnn', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);