Affiliation: | 1. Department of Radiation Oncology, Comprehensive Cancer Center, University of California, Davis, Davis, California, U.S.A.;2. Department of Otolaryngology–Head and Neck Surgery, Comprehensive Cancer Center, University of California, Davis, Davis, California, U.S.A.;3. Department of Pathology, Comprehensive Cancer Center, University of California, Davis, Davis, California, U.S.A. |