1. Ear, Nose & Throat Consultants of Nevada, Las Vegas, Nevada, USA
2. Madison ENT & Facial Plastic Surgery, New York, New York, USA
3. Pasha Snoring & Sinus Center, Houston, Texas, USA
4. Maryland Nose and Sinus Center, Baltimore, Maryland, USA
5. Ohio Sinus Institute, Dublin, Ohio, USA
6. Acclarent Clinical Research, Menlo Park, California, USA
7. Alabama Nasal and Sinus Center, Birmingham, Alabama, USA