1. Department of Otolaryngology, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310012, P.R. China
2. Department of Pharmacy, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310012, P.R. China
3. Department of Pathology, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310012, P.R. China