1. Department of Neurosurgery, Hospital Getúlio Vargas, Recife, Brazil;
2. Postdoctoral Program, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil;
3. Division of Neurological Surgery, University of São Paulo, São Paulo, Brazil;
4. Faculdade Pernambucana de Saúde, Recife, Pernambuco, Brazil;
5. Skull Base Surgery Center, Baylor University Medical Center, Dallas, Texas, USA;
6. Minimally Invasive Brain Surgery Center, Medical City Dallas Hospital, Dallas, Texas, USA;
7. Division of Otorhinolaryngology, Centro de Ciências Médicas, Universidade Federal de Pernambuco, Recife, Brazil