1. Neurosurgery Resident, Department of Neurosurgery, Santa Casa Hospital; Ribeirão Preto, São Paulo, Brazil
2. Medical Student, Centro Universitário Barão de Mauá, Ribeirão Preto, São Paulo, Brazil
3. Medical Student, Faculdade Atenas, Paracatu, Minas Gerais, Brazil
4. Neurosurgeon and Professor, Neurosurgery Department, Santa Casa Hospital; Ribeirão Preto, SP, Brazil
5. Neurosurgeon, Department of Neurosurgery, Santa Casa Hospital; Ribeirão Preto, São Paulo, Brazil