Affiliation: | 1. Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas;2. Department of Thoracic Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas;3. Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas;4. Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas |