1. Department of Neurosurgery, Skull Base Fellowship, University of São Paulo, São Paulo, Brazil;
2. Pernambuco College of Health, Recife, Brazil;
3. Departament of Neurosurgery, University of São Paulo, São Paulo, Brazil;
4. Department of Neurosurgery, Getúlio Vargas Hospital, Recife, Brazil;
5. Skull Base Surgery Center, Baylor University Medical Center, Dallas, Texas, USA;
6. Minimally Invasive Brain Surgery Center, Medical City Hospital, Dallas, Texas, USA