1. Department of Otolaryngology-Head and Neck Surgery; Case Western Reserve University, University Hospitals-Case Medical Center; Cleveland Ohio U.S.A.
2. University of North Carolina School of Medicine; Case Western Reserve University, University Hospitals-Case Medical Center; Cleveland Ohio U.S.A.
3. Department of Radiology; Case Western Reserve University, University Hospitals-Case Medical Center; Cleveland Ohio U.S.A.
4. Chapel Hill, North Carolina; and the Department of Otolaryngology-Head and Neck Surgery; Case Western Reserve University, University Hospitals-Case Medical Center; Cleveland Ohio U.S.A.