[1] Qinghai Univ, Affiliated Hosp, Dept Intervent Therapy, Xining, Peoples R China
[2] Qinghai Univ, Dept Postgrad, Xining, Peoples R China
[3] Qinghai Univ, Affiliated Hosp, Dept Hepatopancreatobiliary Surg, Xining, Peoples R China
[4] Qinghai Prov Key Lab Hydatid Dis Res, Xining, Peoples R China