1. Department of Otolaryngology–Head and Neck SurgeryNorthwestern University Feinberg School of MedicineChicagoIllinoisUSA
2. The Thyroid CenterDivision of Endocrinology and DiabetesChildren’s Hospital of PhiladelphiaPhiladelphiaPennsylvaniaUSA
3. Division of Pediatric OtolaryngologyChildren’s Hospital of PhiladelphiaDepartment of Otolaryngology–Head and Neck SurgeryUniversity of PennsylvaniaPhiladelphiaPennsylvaniaUSA
4. Department of OtolaryngologyUniversity of WashingtonSeattle Children’s HospitalSeattleWashingtonUSA
5. Division of Pediatric OtolaryngologyUPMC Children’s Hospital of PittsburghPittsburghPennsylvaniaUSA
6. Division of Pediatric OtolaryngologyChildren’s Hospital of New Orleans and Louisiana State UniversityNew OrleansLouisianaUSA
7. Division of Pediatric OtolaryngologyAnn & Robert H Lurie Children’s Hospital of ChicagoChicagoIllinoisUSA
8. Stanley Manne Children’s Research InstituteAnn & Robert H. Lurie Children’s Hospital of ChicagoChicagoIllinoisUSA
9. Division of Pediatric OtolaryngologyCincinnati Children’s Hospital Medical CenterCincinnatiOhioUSA
10. Department of SurgeryUniversity of California, San DiegoDivision of OtolaryngologyRady Children’s HospitalSan DiegoCaliforniaUSA
11. Division of Pediatric OtolaryngologyUniversity of Colorado School of MedicineChildren’s Hospital of ColoradoDenverColoradoUSA
12. Division of Pediatric OtolaryngologyMassachusetts Eye and Ear InfirmaryBostonMassachusettsUSA
13. Department of Otolaryngology–Head & Neck SurgeryHospital for Sick ChildrenUniversity of TorontoTorontoCanada
14. Division of Pediatric OtolaryngologyPeyton Manning Children’s Hospital at Ascension St. VincentIndianapolisIndianaUSA
15. Department of Otolaryngology–Head and Neck SurgerySIU School of MedicineSpringfieldIllinoisUSA