function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amado G., E. & Morales A., L. Del. R.', 1],
    ['Chirivi-Joya, Daniel & Moreno-González, Jairo A.', 7],
    ['Giupponi, Alessandro P. L. & Kury, Adriano B.', 4],
    ['Piza, S. D. T.', 1],
    ['Pocock, Reginald Innes', 4],
    ['de Mello-Leitão, Cândido Firmino', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);