1. Department of Otolaryngology‐Head & Neck Surgery University of Mississippi Medical Center Jackson Mississippi U.S.A.
2. Department of Otolaryngology‐Head & Neck Surgery University of Alabama at Birmingham Birmingham Alabama U.S.A.
3. UAB Heersink School of Medicine University of Alabama at Birmingham Birmingham Alabama U.S.A.
4. Department of Otolaryngology‐Head & Neck Surgery Thomas Jefferson University Philadelphia Pennsylvania U.S.A.
5. Department of Otolaryngology‐Head & Neck Surgery Louisiana State University Health Sciences Center New Orleans Louisiana U.S.A.
6. Department of Otolaryngology‐Head & Neck Surgery University of Miami Miami Florida U.S.A.
7. Department of Otolaryngology‐Head & Neck Surgery Oregon Health & Science University Portland Oregon U.S.A.