[1] Princess Margaret Canc Ctr, Toronto, ON, Canada
[2] Princess Margaret Canc Ctr, Dept Otolaryngol Head Neck Surg, Toronto, ON, Canada
[3] Univ Toronto, Toronto, ON, Canada
[4] Princess Margaret Hosp, Toronto, ON, Canada
[5] Princess Margaret Canc Ctr, Dept Radiat Oncol, Toronto, ON, Canada
[6] Univ Michigan, Ann Arbor, MI USA
[7] Princess Margaret Canc Ctr, Lab Med Program, Toronto, ON, Canada
[8] Univ Hlth Network, Princess Margaret Hosp, Toronto, ON, Canada
[9] Univ Toronto, Div Med Oncol & Hematol, Princess Margaret Canc Ctr, Toronto, ON, Canada
[10] Princess Margaret Canc Ctr, Dept Biostat, Toronto, ON, Canada