1. Department of Neurosurgery, Getúlio Vargas University Hospital, Federal University of Amazonas, Manaus,
2. Department of Neurosurgery, Santa Casa de São Paulo, São Paulo,
3. Faculty of Medicine, Faculdade Metropolitana de Manaus, Manaus,
4. Division of Neurosurgery, Hospital das Clínicas, University of São Paulo Medical School, São Paulo,
5. Department of Neurology, Hospital Samaritano de São Paulo, São Paulo, Brazil.