1. Department of Otolaryngology-Head and Neck Surgery, Division of Rhinology; Oregon Health & Science University; Portland Oregon
2. Department of Otolaryngology-Head and Neck Surgery, Division of Rhinology and Sinus/Skull Base Surgery; Medical University of South Carolina; Charleston South Carolina
3. Department of Otolaryngology-Head and Neck Surgery/School of Medicine; Stanford University; Stanford
4. Department of Surgery, Division of Otolaryngology-Head and Neck Surgery; University of Calgary; Calgary Alberta Canada
5. Department of Surgery, Division of Otolaryngology-Head and Neck Surgery; University of California-San Diego; San Diego California U.S.A.