[1] Danzhou Peoples Hosp, Dept Gen Surg, Danzhou, Hainan, Peoples R China
[2] Hubei Coll Chinese Med, Dept Clin Med, Jingzhou, Peoples R China
[3] Shanxi Med Univ, Hosp 1, Dept Resp & Crit Care Med, Taiyuan, Shanxi, Peoples R China
[4] Shengli Oilfield Ctr Hosp, Dept Burn & Plast Surg, Dongying, Shandong, Peoples R China