1. Division of Rhinology and Sinus Surgery, Department of Otolaryngology‒Head and Neck SurgeryUniversity of Virginia Charlottesville VA
2. Division of Otolaryngology‒Head and Neck Surgery, Department of SurgeryUniversity of Calgary Calgary AB Canada
3. Division of Rhinology and Sinus Surgery, Department of Otolaryngology‒Head and Neck SurgeryMedical University of South Carolina Charleston SC
4. Department of SurgeryRalph H. Johnson VA Medical Center Charleston SC
5. Department of Otolaryngology‒Head and Neck SurgeryOregon Health & Science University Portland OR
6. Division of Otolaryngology‒Head and Neck SurgeryDepartment of Surgery, University of Utah School of Medicine Salt Lake City UT