[1] Univ Estado Rio De Janeiro, Dept Surg Specialties, Div Neurosurg, BR-20551900 Rio De Janeiro, RJ, Brazil
[2] Pontificia Catholic Univ Parana PUC PR, Curitiba, Parana, Brazil
[3] Hosp Santa Cruz, Div Neurosurg, Curitiba, Parana, Brazil
[4] Hosp Santa Cruz, Div Neurol, Curitiba, Parana, Brazil