[1] Univ Toronto, Dept Otolaryngol, Toronto, ON M5T 2W9, Canada
[2] TanTock Seng Hosp, Dept Otolaryngol, Singapore, Singapore
[3] Singapore Gen Hosp, Dept Surg, Singapore, Singapore
[4] Natl Canc Ctr, Singapore, Singapore
[5] Univ Hlth Network, Dept Otolaryngol, Toronto, ON, Canada
[6] Princess Margaret Hosp, Wharton Head & Neck Ctr, Toronto, ON M4X 1K9, Canada
[7] Univ Hlth Network, Dept Plast Surg, Toronto, ON, Canada
[8] Singapore Gen Hosp, Dept Plast Surg, Singapore 0316, Singapore