1. Department of Otolaryngology-Head and Neck Surgery, Madigan Army Medical Center, Tacoma, Washington.
2. Department of Otolaryngology-Head and Neck Surgery, Walter Reed Army Medical Center, Washington, DC.
3. Department of Radiology, Brooke Army Medical Center, San Antonio, Texas.
4. Department of Otolaryngology-Head and Neck Surgery, Tripler Army Medical Center, Honolulu, Hawaii.