1. Neurosurgery Residency Program, Discipline of Neurosurgery, Santa Casa de Sao Paulo School of Medical Sciences, Dr. Cesario Motta Jr. 112, 01220-000 Sao Paulo, SP, Brazil
2. Discipline of Neurosurgery, Santa Casa de Sao Paulo School of Medical Sciences and Arnaldo Vieira de Carvalho Cancer Institute, Dr. Cesario Motta Jr. 112, 01220-000 Sao Paulo, SP, Brazil
3. Pathology Residency Program, Department of Pathology, Santa Casa de Sao Paulo School of Medical Sciences, Dr. Cesario Motta Jr. 112, 01220-000 Sao Paulo, SP, Brazil