1. Department of Otolaryngology-Head and Neck Surgery, University of California; Davis Medical Center; Sacramento CA
2. Division of Otolaryngology-Head and Neck Surgery, Department of Surgery; University of Calgary; Calgary Alberta Canada
3. Division of Rhinology and Sinus/Skull Base Surgery, Oregon Sinus Center, Department of Otolaryngology-Head and Neck Surgery; Oregon Health and Science University; Portland OR
4. Division of Otolaryngology, Department of Surgery; University of California San Diego; San Diego CA
5. Sinus and Skull Base Surgery Program, Division of Otolaryngology-Head and Neck Surgery, Department of Surgery; University of Utah School of Medicine; Salt Lake City UT