[1] Henry Ford Hlth Syst, Dept Publ Hlth Sci, One Ford Pl, Detroit, MI 48202 USA
[2] Henry Ford Hlth Syst, Dept Otolaryngol Head & Neck Surg, Detroit, MI USA
[3] St Louis Univ, Sch Med, St Louis, MO USA
[4] Rush Univ, Canc Ctr, Med Ctr, Chicago, IL 60612 USA
[5] Southern Illinois Univ, Dept Otolaryngol Head & Neck Surg, Sch Med, Springfield, IL USA
[6] Univ Illinois, Sch Publ Hlth, Chicago, IL USA
[7] Univ Illinois, Canc Ctr, Chicago, IL USA
[8] Stanford Univ, Dept Med Oncol, Sch Med, Stanford, CA USA
[9] Stanford Canc Inst, Stanford, CA USA
[10] Washington Univ, Sch Med, Dept Radiat Oncol, St Louis, MO USA
[11] Duke Univ, Sch Med, Dept Head & Neck Surg & Commun Sci, Durham, NC USA
[12] Duke Univ, Sch Med, Dept Populat Hlth Sci, Durham, NC USA