1. Department of Otorhinolaryngology Head and Neck Surgery, Lihuili Hospital affiliated to Ningbo University, Ningbo, Zhejiang, China
2. Department of Otology and Skull Base Surgery, National Health Commission Key Laboratory of Hearing Medicine (Fudan University), Shanghai City, P. R. China
3. Department of Thoracic surgery, The Affiliated Lihuili Hospital, Ningbo University, Ningbo, Zhejiang Province, P. R. China