1 Department of Neurology, Santa Casa de São Paulo School of Medical Sciences, Dr. Cesário Motta Júnior Street 112, 01221-020 São Paulo, Brazil. Electronic address: z_azul@hotmail.com.
2 Department of Pathology, Santa Casa de São Paulo School of Medical Sciences, Dr. Cesário Motta Júnior Street 112, 01221-020 São Paulo, Brazil.