1. Division of Rhinology and Sinus Surgery; Oregon Sinus Center; Department of Otolaryngology-Head and Neck Surgery; Oregon Health and Science University; Portland OR
2. Division of Head and Neck Surgery; Rhinology-Sinus and Skull Base Surgery Program; Department of Surgery; University of Utah; Salt Lake City UT
3. Division of Rhinology; Nose and Sinus Center; Department of Otolaryngology-Head and Neck Surgery; Medical University of South Carolina; Charleston SC