1. Division of Otolaryngology-Head and Neck Surgery, Department of Surgery; University of Calgary; Calgary Alberta Canada
2. Acclarent (c.e.h.); Menlo Park California U.S.A.
3. Division of Rhinology and Sinus Surgery, Oregon Sinus Center, Department of Otolaryngology-Head and Neck Surgery; Oregon Health and Science University; Portland Oregon U.S.A.