Affiliation: | 1. Department of Otorhinolaryngology–Head and Neck Surgery, University of Pennsylvania, Philadelphia, PA;2. Department of Otorhinolaryngology–Head and Neck Surgery, Aurora Medical Group, Milwaukee, WI;3. Department of Neurosurgery, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA;4. Department of Radiology, University of Pennsylvania, Philadelphia, PA |