1. Department of Otolaryngology–Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
2. Division of Rhinology and Sinus Surgery, Oregon Sinus Center, Department of Otolaryngology–Head and Neck Surgery, Oregon Health and Science University, Portland, Oregon
3. Department of Otology and Laryngology, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, Massachusetts