1. Department of Otolaryngology ‐ Head & Neck Surgery University of Washington Seattle Washington U.S.A.
2. Division of Pediatric Otolaryngology Seattle Children's Hospital Seattle Washington U.S.A.
3. Department of Radiology, Prenatal Imaging University of Washington Seattle Washington U.S.A.
4. Department of Obstetrics and Gynecology, Division of Maternal‐Fetal Medicine University of Washington Seattle Washington U.S.A.