[1] Tianjin Nankai Hosp, Tianjin Hosp ITCWM, Dept Resp Med, Tianjin 300100, Peoples R China
[2] Tianjin Med Univ, Hosp 2, Dept Thorac Surg, Tianjin, Peoples R China
[3] Tianjin Nankai Hosp, Tianjin Hosp ITCWM, Tianjin 300100, Peoples R China
[4] Tianjin Med Univ, Canc Inst & Hosp, Dept Senior Ward, Tianjin, Peoples R China
[5] Key Lab Canc Prevent & Therapy, Tianjin, Peoples R China