[He, Bixiu; Lu, Xiaoxiao; Chen, Qiong; Xiao, Jian] Cent S Univ, Xiangya Hosp, Dept Geriatr, Resp Med, Changsha, Hunan, Peoples R China.
[Liu, Aibin] Cent S Univ, Xiangya Hosp, Dept Geriatr, Changsha, Hunan, Peoples R China.
[Chen, Xi] Cent S Univ, Xiangya Hosp, Dept Resp Med, Changsha, Hunan, Peoples R China.
[Li, Wei] Cent S Univ, Xiangya Hosp, Dept Geriatr, Clin Lab, Changsha, Hunan, Peoples R China.
[He, Shuya] Univ South China, Dept Biochem & Biol, Hengyang, Peoples R China.