[1] Hebei North Univ, Affiliated Hosp 1, Phys Examinat Ctr, Zhangjiakou 075000, Peoples R China
[2] Hebei North Univ, Hosp Off, Affiliated Hosp 1, Zhangjiakou 075000, Peoples R China
[3] Hebei North Univ, Grad Sch, Zhangjiakou 075000, Peoples R China
[4] Hebei North Univ, Affiliated Hosp 1, Dept Gen Surg, 12 Changqing Rd, Zhangjiakou 075000, Peoples R China
[5] Hebei North Univ, Affiliated Hosp 1, Tumor Res Inst, Zhangjiakou 075000, Peoples R China
[6] Fourth Mil Med Univ, Sch Basic Med, Xian 710032, Peoples R China
[7] Xinchang Cty Peoples Hosp, Dept Ophthalmol, 117 Gushan Middle Rd, Shaoxing 312500, Zhejiang, Peoples R China