1. Department of Otolaryngology‐Head and Neck Surgery University of Utah Salt Lake City Utah U.S.A.
2. Department of Otolaryngology State University of New York Downstate Medical Center Stony Brook New York U.S.A.
3. Johns Hopkins University School of Medicine Baltimore Maryland U.S.A.
4. Department of Surgery University of Utah Salt Lake City Utah U.S.A.
5. University of Utah Center for Human Toxicology and Department of Pharmacology and Toxicology Salt Lake City Utah U.S.A.