Z C Lou1, Y M Tang2, H Y Chen1, J Xiao3. 1. Department of Otorhinolaryngology, The Affiliated YiWu Hospital of Wenzhou Medical College, Zhejiang, China. 2. Department of pathology, The Affiliated YiWu Hospital of Wenzhou Medical College, Zhejiang, China. 3. Molecular Pharmacology Research Center, School of Pharmacy, Wenzhou Medical University, Zhejiang, China.