1. Department of Radiation Oncology, University of California, Davis, Comprehensive Cancer Center, Sacramento3now with the Department of Radiation Oncology, David Geffen School of Medicine, University of California, Los Angeles.
2. Department of Radiation Oncology, University of California, Davis, Comprehensive Cancer Center, Sacramento
3. Department of Otolaryngology–Head and Neck Surgery, University of California, Davis, Comprehensive Cancer Center, Sacramento