| Affiliation: | 1. Rhinology and Endoscopic Sinus Surgery, Division of Otolaryngology–Head and Neck Surgery, Department of Surgery, University of Calgary, Calgary, Alberta, Canada;2. Division of Neurosurgery, Department of Clinical Neurological Sciences, University of Calgary, Calgary, Alberta, Canada;3. Department of Neurosurgery, Medical University of South Carolina, Charleston, South Carolina, U.S.A;4. Division of Rhinology and Sinus Surgery, Department of Otolaryngology–Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, U.S.A |
