1. Bethesda, MD; Melbourne, Australia; Loma Linda, CA; San Francisco, CA; Columbus, OH; Savannah, GA; Cleveland, OH; Birmingham, AL; Palo Alto, CA; and Biloxi, MS
2. Maryland Sinus Center, Bethesda
3. Sandringham District Memorial Hospital
4. Bayside Network, Melbourne; Loma Linda University
5. University of California-San Francisco
6. Ohio Sinus Institute, Columbus
7. Georgia Nasal and Sinus Institute, Savannah
8. Cleveland Nasal, Sinus and Sleep Center
9. Alabama Nasal and Sinus Center, Birmingham
10. California Sinus Institute (Dr Vaughan), Palo Alto
11. Sinus Center of the South, Biloxi