Affiliation: | 1. Department of Otolaryngology–Head and Neck Surgery, University of North Carolina at Chapel Hill, , Chapel Hill, North Carolina, U.S.A;2. Department of Neurosurgery, University of North Carolina at Chapel Hill, , Chapel Hill, North Carolina, U.S.A;3. Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, , Bethesda, Maryland, U.S.A |