1. Division of Otolaryngology–Head and Neck Surgery, Department of Surgery, University of Calgary, Calgary, Alberta, Canada
2. Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
3. Division of Otolaryngology–Head and Neck Surgery, Rhinology–Sinus and Skull Base Surgery Program, Department of Surgery, University of Utah, Salt Lake City
4. Division of Otolaryngology–Head and Neck Surgery, Department of Surgery, University of California, San Diego
5. Division of Rhinology and Sinus/Skull Base Surgery, Oregon Sinus Center, Department of Otolaryngology–Head and Neck Surgery, Oregon Health and Science University, Portland
6. Division of Rhinology and Sinus Surgery, Department of Otolaryngology–Head and Neck Surgery, Medical University of South Carolina, Charleston