1 Sinus and Skull Base Surgery Program, Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of Utah, Salt Lake City, UT.
2 Department of Otolaryngology, University of Colorado, Aurora, CO.
3 Department of Otolaryngology-Head and Neck Surgery, Boston University School of Medicine, Boston, MA.
4 Division of Rhinology and Sinus Surgery, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC.