[1] Southern Med Univ, Grad Sch, Guangzhou 510000, Guangdong, Peoples R China
[2] Peoples Hosp Hainan, Dept Med Ctr, Haikou 570311, Hainan, Peoples R China
[3] Peoples Hosp Hainan, Dept Orthoped, Haikou 570311, Hainan, Peoples R China
[4] Southern Med Univ, Dept Resp Med, Zhujiang Hosp, 253 Gongye Middle Rd, Guangzhou 510000, Guangdong, Peoples R China
[5] Hainan Med Univ, Inst Trop Med & Lab Med, Haikou 570311, Hainan, Peoples R China