1. Department of Neurosurgery, Santa Casa de Belo Horizonte, Belo Horizonte, MG, Brazil
2. Department of Neurosurgery, Medicine and Life Sciences Education, Maastricht University Medical Center, Maastricht, The Netherlands
3. Hospital Estadual Getúlio Vargas, Rio de Janeiro, RJ, Brazil
4. Department of Neurosurgery, Universidade de São Paulo, SP, Brazil
5. Associação de Combate ao Câncer em Goiás, Goiás, GO, Brazil