[1] Fourth Mil Med Univ, State Key Lab Canc Biol, Xian, Shaanxi, Peoples R China
[2] Fourth Mil Med Univ, Expt Teaching Ctr Basic Med, Xian, Shaanxi, Peoples R China
[3] Shaanxi Prov Peoples Hosp, Dept Hepatobiliary Surg, Xian, Shaanxi, Peoples R China
[4] Fourth Mil Med Univ, Tangdu Hosp, Dept Pain Treatment, Xian, Shaanxi, Peoples R China