1. Department of Otolaryngology ‐ Head and Neck SurgeryColumbia University Medical Center New York New York U.S.A.
2. Advanced ENT and Allergy Louisville Kentucky U.S.A.
3. South Carolina ENT Allergy and Sleep Medicine Columbia South Carolina U.S.A.
4. South Florida Pediatric Otolaryngology Fort Lauderdale Florida U.S.A.
5. Sacramento Ear, Nose and Throat Roseville California U.S.A.
6. Ear, Nose, and Throat Specialists of Abilene Abilene Texas U.S.A.
7. Charlotte Eye, Ear, Nose, and Throat Associates Matthews North Carolina U.S.A.
8. California Head and Neck Specialists Carlsbad California U.S.A.
9. Frisco ENT for Children Frisco Texas U.S.A.
10. Albany ENT and Allergy Albany New York U.S.A.
11. Department of Surgery, Division of OtolaryngologyYale New Haven Children's Hospital New Haven Connecticut U.S.A.
12. Carolina Ear, Nose, and Throat Clinic Orangeburg South Carolina U.S.A.
13. Specialty Physician Associates Bethlehem Pennsylvania U.S.A.
14. Department of Surgery, Division of Otolaryngology ‐ Head and Neck SurgeryBritish Columbia Children's Hospital Vancouver British Columbia Canada
15. Camino Ear, Nose, and Throat Clinic San Jose California U.S.A.
16. ENT Clinics of San Antonio San Antonio Texas U.S.A.
17. Department of Surgery, Division of OtolaryngologyNemours Children's Specialty Care Jacksonville Florida U.S.A.
18. Division of OtolaryngologyConnecticut Children's Medical Center Hartford Connecticut U.S.A.
19. Tusker Medical, Inc. Menlo Park California U.S.A.
20. Ear Medical Group San Antonio Texas U.S.A.