1. Department of Otolaryngology–Head and Neck SurgeryUniversity of Washington Seattle Washington U.S.A
2. Division of Pediatric Otolaryngology–Head and Neck SurgerySeattle Children's Hospital Seattle Washington U.S.A
3. Childhood Communication CenterSeattle Children's Hospital Seattle Washington U.S.A
4. Children's Core for Biomedical StatisticsSeattle Children's Research Institute Seattle Washington U.S.A.
5. Division of AudiologySeattle Children's Hospital Seattle Washington U.S.A