1. Otolaryngology Service, Madigan Army Medical Center, Tacoma.
2. Division of Pediatric Otolaryngology, Children's Hospital and Regional Medical Center, Seattle.
3. Department of Otolaryngology—Head and Neck Surgery, University of Washington, Seattle.
4. Craniofacial Center, Children's Hospital and Regional Medical Center. Seattle.
5. Child Health Institute, University of Washington, Seattle.
6. Department of Pediatrics, University of Washington, Seattle, Washington.