1. Neurosurgery Residency Program, Discipline of Neurosurgery, Santa Casa de Sao Paulo School of Medical Sciences, Rua Doutor Cesário Mota Júnior 112, 01220-0202 Sao Paulo, SP, Brazil
2. Discipline of Neurosurgery, Santa Casa de Sao Paulo School of Medical Sciences, Rua Doutor Cesário Mota Júnior 112, 01220-0202 Sao Paulo, SP, Brazil