1. Department of Otolaryngology-Head and Neck Surgery, Division of Rhinology; Oregon Health & Science University; Portland OR
2. Department of Surgery, Division of Otolaryngology-Head and Neck Surgery, Cumming School of Medicine; University of Calgary; Calgary AB Canada
3. Department of Otolaryngology-Head and Neck Surgery, Division of Rhinology and Sinus Surgery; Medical University of South Carolina; Charleston SC
4. Department of Surgery, Division of Otolaryngology-Head and Neck Surgery; University of California; San Diego CA