1. Department of Otolaryngology‐Head and Neck Surgery Emory University School of Medicine Atlanta Georgia U.S.A.
2. Department of Rehabilitation Services Children's Healthcare of Atlanta Atlanta Georgia U.S.A.
3. Division of Biostatistics, Department of Pediatrics Emory University School of Medicine Atlanta Georgia U.S.A.
4. Division of Pediatric Otolaryngology Children's Healthcare of Atlanta Atlanta Georgia U.S.A.