1. The 3rd Department of Digestion, Shanxi Province Cancer Hospital, Shanxi Hospital Affifiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affifiliated to Shanxi Medical University , Taiyuan City , Shanxi Province, 030013 , P. R. China
2. Radiotherapy Head and Neck Department, Shanxi Province Cancer Hospital, Shanxi Hospital Affifiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affifiliated to Shanxi Medical University , Taiyuan City , Shanxi Province, 030013 , P. R. China
3. The 2nd Department of Chest Surgery, Shanxi Province Cancer Hospital, Shanxi Hospital Affifiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affifiliated to Shanxi Medical University , No. 3 Workers Xin Jie, Xinghualing District , Taiyuan City , Shanxi Province, 030013 , P. R. China