1. Department of Otorhinolaryngology, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of Medicine, Hangzhou, P.R. China
2. Department of Otorhinolaryngology, Hangzhou First People’s Hospital, Nanjing Medical University, Hangzhou, P.R. China
3. Department of Pathology, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of Medicine, Hangzhou, P.R. China
4. The Fourth Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, P.R. China