Affiliation: | ∗ Department of Otorhinolaryngology, Medical School, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Port Alegre - RS, Brazil † Federal University of Sao Paulo, Sao Paulo, Brazil ‡ Department of Otorhinolaryngology and Head and Neck Surgery, Federal University of Sao Paulo, Sao Paulo, Brazil |