1. Walter Reed National Military Medical Center Bethesda Maryland U.S.A.
2. Department of Otolaryngology – Head and Neck Surgery Walter Reed National Military Medical Center Bethesda Maryland U.S.A.
3. Department of Otorhinolaryngology Ochsner Clinic Foundation New Orleans Louisiana U.S.A.
4. Division of Otolaryngology – Head and Neck Surgery Fort Belvoir Community Hospital Fort Belvoir Virginia U.S.A.
5. Department of Surgery Uniformed Services University of the Health Sciences Bethesda Maryland U.S.A.