1. Department of Otorhinolaryngology University Hospital of Brasília UnB‐EBSERH Brasilia Federal District Brazil
2. Department of Ophthalmology and Otorhinolaryngology Ribeirão Preto Medical School‐USP Ribeirão Preto São Paulo Brazil
3. Division of Otorhinolaryngology, D'Or Institute of Education and Research Hospital Santa Luzia Brasilia Brazil
4. Department of Otorhinolaryngology State University of Londrina Pontifical Catholic University of Paraná Londrina PR Brazil
5. Division of Neurosurgery Hospital de Base of Distrito Federal Brasilia DF Brazil
6. Department of Statistics University of Brasilia Brasília DF Brazil
7. Department of Ophthalmology and Otorhinolaryngology University of São Paulo São Paulo Brazil
8. Engineering Department Noar Company São Paulo Brazil