1 Department of Neurology, Federal University of the State of Rio de Janeiro, 775 Mariz Barros Street, Rio de Janeiro, RJ, 20270-004, Brazil. slschmidt@terra.com.br.
2 Department of Neurology, Federal University of the State of Rio de Janeiro, 775 Mariz Barros Street, Rio de Janeiro, RJ, 20270-004, Brazil.