1. Department of Otolaryngology Children's National Medical Center Washington District of Columbia U.S.A.
2. George Washington University School of Medicine and Health Sciences Washington District of Columbia U.S.A.
3. Department of Otolaryngology & Communication Enhancement Boston Children's Hospital Boston Massachusetts U.S.A.
4. Harvard Medical School Boston Massachusetts U.S.A.
5. Department of Otolaryngology‐Head and Neck Surgery, Boston Medical Center Boston University School of Medicine Boston Massachusetts U.S.A.
6. Department of Otolaryngology‐Head and Neck Surgery University of Massachusetts Worcester Massachusetts U.S.A.