function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abrahão, Vitor & Mol, Jan & Pinna, Mario De', 1],
    ['Gill, T. N.', 1],
    ['Kner, R.', 1],
    ['Litz, Thomas O. & The, Stefan Koerber Introduction', 1],
    ['Ota, Renata Rúbia & Deprá, Gabriel de Carvalho', 1],
    ['Spix, J. B. von & Agassiz, Jean Louis Rodolphe', 1],
    ['Steindachner, F.', 1],
    ['The, Stefan Koerber', 3],
    ['Vari, Richard P. & Ferraris Jr, Carl J. & de Pinna, Mário C. C.', 20],
    ['de Oliveira, J. Chacon & Vari, Richard P. & Ferraris, Carl J.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    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);