1. Department of Otolaryngology–Head and Neck Surgery, University of North Carolina, Chapel Hill, North Carolina, USA
2. Department of Otolaryngology–Head and Neck Surgery, Johns Hopkins University, Baltimore, Maryland, USA
3. Department of Otolaryngology–Head and Neck Surgery, Oregon Health and Science University, Portland, Oregon, USA
4. Asheville Head, Neck, and Ear Surgeons, Asheville, North Carolina, USA
5. Department of Pediatric Cardiology, University of North Carolina, Chapel Hill, North Carolina, USA