1. Eaton–Peabody Laboratories Massachusetts Eye and Ear Infirmary Boston Massachusetts U.S.A.
2. Department of Otolaryngology Harvard Medical School Boston Massachusetts U.S.A.
3. Department of Otolaryngology University of Massachusetts Medical School Worcester Massachusetts U.S.A.
4. Department of Otolaryngology UMass Memorial Medical Center Worcester Massachusetts U.S.A.
5. Department of Otolaryngology–Head and Neck Surgery Johns Hopkins School of Medicine Baltimore Maryland U.S.A.