[1] Dalian Med Univ, Thorac Oncol Dept, Affiliated Hosp 1, Dalian, Peoples R China
[2] Ist Europeo Oncol, Dept Oncol, Milan, Italy
[3] Dalian Med Univ, Dept Oncol, Affiliated Hosp 2, Dalian, Peoples R China
[4] Univ Chinese Acad Sci, Beijing, Peoples R China
[5] Dalian Med Univ, Thorac Oncol Dept, Dalian, Peoples R China