1. Northwestern University Feinberg School of Medicine
2. Department of Otolaryngology-Head and Neck Surgery, Pediatric Thyroid Tumor Program and Pediatric Head and Neck Tumor Program, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, USA
3. Department of Pediatric Otolaryngology, Le Bonheur Children's Hospital
4. Department of Otolaryngology-Head and Neck Surgery, University of Tennessee Health Science Center
5. Department of Pediatric Otolaryngology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, Tennessee
6. Department of Otolaryngology-Head and Neck Surgery, Northwestern University Feinberg School of Medicine
7. Division of Pediatric Otolaryngology, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois