Affiliation: | 1. Departments of Head and Neck Surgery, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, U.S.A.;2. Baylor College of Medicine, Houston, Texas, U.S.A.;3. Departments of Pathology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, U.S.A.;4. The University of Texas Southwestern Medical School, Dallas, Texas, U.S.A.;5. Departments of Head and Neck Surgery, Epidemiology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, U.S.A. |