1. Division of Neurology, Instituto de Neurologia Deolindo Couto; Federal University of Rio de Janeiro; Brazil
2. Division of Neurology, Hospital Universitário Clementino Fraga Filho; Federal University of Rio de Janeiro; Brazil
3. Division of Neuroradiology, Medimagem; Hospital Beneficência Portuguesa; São Paulo Brazil
4. Division of Neuropathology, Department of Pathology, Hospital Universitário Clementino Fraga Filho; Federal University of Rio de Janeiro; Brazil