1. Department of Otolaryngology–Head and Neck Surgery University of Washington Medical Center Seattle Washington U.S.A.
2. Department of Radiation Oncology University of Washington Medical Center Seattle Washington U.S.A.
3. Department of Otolaryngology–Head and Neck Surgery University of Utah Salt Lake City Utah U.S.A.
4. Department of Medicine, Division of Oncology University of Washington Medical Center Seattle Washington U.S.A.