1 Department of Otorhinolaryngology, Head, and Neck Surgery, Tianjin First Central Hospital, Institute of Otolaryngology of Tianjin, Key Laboratory of Auditory Speech and Balance Medicine, Key Medical Discipline of Tianjin (Otolaryngology), Quality Control Centre of Otolaryngology, Tianjin, China.
2 Department of Otorhinolaryngology, Head, and Neck Surgery, Tianjin First Central Hospital, Institute of Otolaryngology of Tianjin, Key Laboratory of Auditory Speech and Balance Medicine, Key Medical Discipline of Tianjin (Otolaryngology), Quality Control Centre of Otolaryngology, Tianjin, China; The First Central Clinical School, Tianjin Medical University, Tianjin, China.
3 Department of Gastroenterology, Ningbo First Hospital, Ningbo, China.
4 Department of Otorhinolaryngology, Head, and Neck Surgery, Tianjin First Central Hospital, Institute of Otolaryngology of Tianjin, Key Laboratory of Auditory Speech and Balance Medicine, Key Medical Discipline of Tianjin (Otolaryngology), Quality Control Centre of Otolaryngology, Tianjin, China. Electronic address: zh_gm@163.com.