1 Division of Neurology, Department of Clinical Medicine, Federal University of Ceará, Rua Capitão Francisco Pedro, 1290, Rodolfo Teófilo, Fortaleza, Ceara, 60430, Brazil. paulo_r_med@yahoo.com.br.
2 Division of Neurology, Department of Clinical Medicine, Federal University of Ceará, Rua Capitão Francisco Pedro, 1290, Rodolfo Teófilo, Fortaleza, Ceara, 60430, Brazil.