1. Neurosurgery Residency Program, Department of Neurosurgery, Hospital Santa Casa, Ribeirão Preto, SP, Brazil
2. Professor and Neurosurgeon, Department of Neurosurgery, Hospital Santa Casa, Ribeirão Preto, SP, Brazil
3. Neurosurgeon, Department of Neurosurgery, Hospital Santa Casa, Ribeirão Preto, SP, Brazil
4. Medical Student, Faculdade Atenas, Paracatu, Minas Gerais, Brazil