Affiliation: | 1. Assistant Professor of ENT - Medical Sciences School - Universidade Nacional de Assunção, ENT assistant physician;2. Full Professor of ENT - Medical Sciences School - Universidade Nacional de Assunção, Chefe do Serviço;3. Resident Physician - Hospital General Universitário Gregorio Marañon Madrid;4. Full Professor of Otorhinolaryngology - Medical Sciences School Santa Casa de São Paulo |