1. Department of Thoracic Surgery, Shanxi Provincial Cancer Hospital, Taiyuan, Shanxi 030013, P.R. China
2. Department of Respiratory Diseases, Shanxi Provincial Cancer Hospital, Taiyuan, Shanxi 030013, P.R. China
3. Department of Thoracic Radiotherapy, Shanxi Provincial Cancer Hospital, Taiyuan, Shanxi 030013, P.R. China
4. Taiyuan Jinyu Clinical Laboratory, Taiyuan, Shanxi 030013, P.R. China