1. Department of Otolaryngology–Head and Neck Surgery Medical University of South Carolina Charleston South Carolina
2. Division of Rhinology and Sinus/Skull Base Surgery, Oregon Sinus Center, Department of Otolaryngology–Head and Neck Surgery Oregon Health and Science University Portland Oregon
3. Sinus and Skull Base Surgery Program, Division of Otolaryngology–Head and Neck Surgery, Department of Surgery University of Utah Salt Lake City Utah
4. Department of Otolaryngology University of Colorado Aurora Colorado
5. Division of Rhinology and Sinus Surgery, Department of Otolaryngology–Head and Neck Surgery University of Virginia Charlottesville Virginia U.S.A.