1. Department of Neurology and Neurosurgery, Universidade Federal de São Paulo, São Paulo, SP, Brazil
2. Department of Neurosurgery, Faculdade de Medicina da Universidade Estadual Paulista, Botucatu, SP, Brazil
3. Department of Neurosurgery, Hospital Regional de Presidente Prudente, Presidente Prudente, SP, Brazil
4. Department of Neurosurgery, Instituto Estadual do Cérebro Paulo Niemeyer, Rio de Janeiro, RJ, Brazil
5. Department of Neurosurgery, Hospital de Urgencias Governador Otavio Lage, Goania, GO, Brazil
6. Department of Neurosurgery, Hospital de Neurologia Santa Monica, Goiania, GO, Brazil
7. Department of Neurosurgery, Santa Casa de Misericordia de Belo Horizonte, Belo Horizonte, MG, Brazil
8. Department of Neurosurgery, Conjunto Hospitalar de Sorocaba –SECONCI, Sorocaba, SP, Brazil
9. Department of Neurosurgery, Hospital São Lucas da PUCRS, Porto Alegre, RS, Brazil
10. Departmento of Ophtalmology, Universidade Federal de São Paulo, São Paulo, SP, Brazil
11. Department of Neurosurgery, Hospital Beneficencia Portuguesa de São Paulo, São Paulo, SP, Brazil