1. Medical School, Universidade de Passo Fundo, Passo Fundo, RS, Brazil
2. Academic League of Neurology and Neurosurgery Service (LASNN), Passo Fundo, RS, Brazil
3. Neurology and Neurosurgery Service (SNN), Passo Fundo, RS, Brazil
4. Department of Neurosurgery, Hospital de Clínicas de Passo Fundo, Passo Fundo, RS, Brazil
5. ENT surgeon, Hospital de Clínicas de Passo Fundo, Passo Fundo, RS, Brazil
6. Department of Oral and Maxillofacial Surgery, Hospital de Clínicas de Passo Fundo, RS, Brazil
7. Hospital de Clínicas de Passo Fundo, RS, Brazil
8. Instituto de Patologia de Passo Fundo, Passo Fundo, RS, Brazil