1. Department of Neurosurgery, Hospital Santa Casa, Ribeirão Preto, SP, Brazil
2. Medical Student, Universidade de Ribeirão Preto - Unaerp, Ribeirão Preto, SP, Brazil
3. Medical Student, Faculdade Atenas, Paracatu, MG, Brazil
4. Department of Neurosurgery, Fundação Beneficiente Hospital de Cirurgia, Aracaju, Sergipe, Brazil
5. Neurosurgeon and Professor, Department of Neurosurgery, Hospital Santa Casa, Ribeirão Preto, SP, Brazil