[1] Brazilian Lutheran Univ, Canoas, RS, Brazil
[2] Mt Sinai Hosp, Dept Otolaryngol H&N Surg, Toronto, ON M5G 1X5, Canada
[3] ULBRA Mae Deus Univ Hosp, ENT Dept, Canoas, RS, Brazil
[4] Univ Sao Paulo, BR-05508 Sao Paulo, Brazil
[5] Santa Casa Misericordia Porto Alegre, Ophthalmol Residency Program, Porto Alegre, RS, Brazil
[6] Univ Adelaide, Dept Otolaryngol Head & Neck Surg, Adelaide, SA, Australia
[7] Univ Adelaide, Dept ORL HNS, Adelaide, SA, Australia