1. University of Michigan, Ann Arbor, Michigan, USA
2. ENT and Allergy Associates, Englewood, New Jersey, USA
3. Southeastern Regional Medical Center, Lumberton, North Carolina, USA
4. Southern New England Ear, Nose, Throat & Facial Plastic Surgery, New Haven, Connecticut, USA
5. American Academy of Otolaryngology–HNS, Alexandria, Virginia, USA
6. The Ohio State University, Columbus, Ohio, USA