| Affiliation: | 1. Department of Radiation Oncology, University of North Carolina School of Medicine, Chapel Hill, North Carolina;2. Lineberger Comprehensive Cancer Center, University of North Carolina Hospitals, Chapel Hill, North Carolina;3. Department of Radiation Oncology, University of Florida Hospitals, Gainesville, Florida;4. Shands Cancer Center, University of Florida Hospitals, Gainesville, Florida;5. Department of Otolaryngology, Head and Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, North Carolina;6. Division of Hematology Oncology, Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina |
