1. Otolaryngology-Head & Neck Surgery, Madigan Army Medical Center, Tacoma, Washington, USA.
2. Otolaryngology-Head & Neck Surgery, Tripler Army Medical Center, Honolulu, Hawaii, USA.
3. Otolaryngology-Head & Neck Surgery, Walter Reed National Military Medical Center, Bethesda, Maryland, USA.
4. Otolaryngology-Head & Neck Surgery, Brooke Army Medical Center, Fort Sam Houston, Texas, USA.
5. Otolaryngology-Head & Neck Surgery, Eisenhower Army Medical Center, Augusta, Georgia, USA.