1. Chicago Nasal & Sinus Center Chicago Illinois USA
2. Madison ENT & Facial Plastic Surgery New York New York USA
3. Alamo ENT Associates San Antonio Texas USA
4. Colorado ENT & Allergy Colorado Springs Colorado USA
5. Department of Otolaryngology ‐ Head and Neck Surgery Mount Sinai Hospital New York New York USA
6. Department of Otolaryngology ‐ Head and Neck Surgery University of Cincinnati College of Medicine Cincinnati Ohio USA
7. Department of Otorhinolaryngology—Head and Neck Surgery Rush University Medical Center Chicago Illinois USA
8. Otolaryngology (Ear, Nose and Throat) University of Rochester Medical Center Rochester New York USA
9. Diagnostic Radiology – Midwest Imaging Professionals Chicago Illinois USA
10. Department of Otolaryngology Vanderbilt University Medical Center Nashville Tennessee USA