1. Department of Otolaryngology-Head and Neck Surgery; Oregon Health Sciences University; Portland Oregon U.S.A.
2. Department of Surgery and Neurosurgery; George Washington Medical Faculty Associates; Washington DC U.S.A
3. Department of Otorhinolaryngology; McGovern Medical School at the University of Texas Health Science Center of Houston; Houston Texas U.S.A
4. Sacramento ENT; Roseville California U.S.A
5. Advanced ENT and Allergy; Louisville Kentucky U.S.A
6. Providence St. Vincent Medical Center; Portland Oregon U.S.A.
7. Divisions of Rhinology and Endoscopic Sinus-Skull Base Surgery and Allergy; Eastern Virginia Medical School; Norfolk Virginia U.S.A
8. Intersect ENT; Menlo Park California U.S.A