Affiliation: | 1. Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas;2. Department of Radiation Oncology, Stanford University, Stanford, California;3. Department of Radiation Physics, University of Texas MD Anderson Cancer Center, Houston, Texas;4. Department of Diagnostic Radiology, University of Texas MD Anderson Cancer Center, Houston, Texas;5. Department of Head and Neck Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas |