1. Department of Otolaryngology – Head and Neck Surgery Eastern Virginia Medical School Norfolk Virginia USA
2. Department of Otolaryngology – Head and Neck Surgery University of Pennsylvania Philadelphia Pennsylvania USA
3. Division of Allergy–Immunology University of South Florida Tampa Florida USA
4. Department of Otolaryngology–Head Neck Surgery, University of Missouri Missouri USA
5. Department of Otolaryngology–Head Neck Surgery Johns Hopkins School of Medicine Baltimore Maryland USA
6. Department of Otolaryngology–Head and Neck Surgery University of Pittsburgh Pittsburgh Pennsylvania USA
7. Division of Allergy–Immunology Northwestern University Chicago Illinois USA
8. Department of Otolaryngology–Head and Neck Surgery Medical University of South Carolina South Carolina Charleston USA
9. Department of Otolaryngology – Head and Neck Surgery University of California Los Angeles California USA