1. From the Department of Otolaryngology–Head and Neck Surgery, Medical University of South Carolina, Charleston
2. Department of Otolaryngology, University of Pittsburgh Medical Center, University of Virginia Health Sciences Center, Charlottesville.
3. Department of Otolaryngology–Head and Neck Surgery, University of Virginia Health Sciences Center, Charlottesville.
4. Department of Radiology, University of Virginia Health Sciences Center, Charlottesville.