1. Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.
2. The University of Chicago Pritzker School of Medicine, Chicago, Illinois, USA.
3. Washington State University Elson S. Floyd College of Medicine, Spokane, Washington, USA.
4. Pediatric Thyroid Tumor Program, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, USA.
5. Pediatric Head and Neck Tumor Program; Department of Otolaryngology-Head and Neck Surgery, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, USA.
6. Department of Otolaryngology-Head and Neck Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.
7. Department of Pediatric Otolaryngology, Le Bonheur Children's Hospital, Memphis, Tennessee, USA.
8. Department of Otolaryngology-Head and Neck Surgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA.
9. Department of Pediatric Otolaryngology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA.
10. Division of Pediatric Otolaryngology, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA.