[1] Cent S Univ, Xiangya Hosp 2, Resp Dis Res Inst Hunan Prov, 139 Renmin Rd, Changsha 410011, Hunan, Peoples R China
[2] Cent S Univ, Resp Dis Diag & Treatment Ctr, Pulm & Critical Care Med, 139 Renmin Rd, Changsha 410011, Hunan, Peoples R China
[3] Cent S Univ, Xiangya Hosp 2, Pathol Dept, 139 Renmin Rd, Changsha 410011, Hunan, Peoples R China