| Affiliation: | 1. Department of Otolaryngology Head and Neck Surgery, China‐Japan Friendship Hospital, Beijing;2. Department of Head and Neck Surgery, Shenmu County Hospital, Shanxi Province, People's Republic of China;3. Veterans Affairs Pittsburgh Health System and UPMC Department of Otolaryngology/Head and Neck Surgery, University of Pittsburgh Medical Center, Eye and Ear Institute, Pittsburgh, Pennsylvania, U.S.A.;4. Department of Neurosurgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, U.S.A. |
