1. Department of Thoracic Surgery, Zhejiang Cancer Hospital, Hangzhou, Zhejiang 310022, P.R. China
2. School of Medicine, Zhejiang University City College, Hangzhou, Zhejiang 310000, P.R. China
3. Department of Pathology, Zhejiang Cancer Hospital, Hangzhou, Zhejiang 310000, P.R. China