[1] Tianjin Med Univ, Cent Clin Coll 3, Dept Ultrasound, Tianjin 300170, Peoples R China
[2] Artificial Cell Engn Technol Res Ctr Publ Hlth Min, Tianjin Inst Hepatobiliary Dis, Dept Ultrasound, Tianjin Key Lab Artificial Cell, Tianjin 300170, Peoples R China
[3] Tianjin Third Cent Hosp, Tianjin Inst Hepatobiliary Dis, Artificial Cell Engn Technol Res Ctr Publ Hlth Min, Tianjin Key Lab Artificial Cell,Dept Ultrasound, 83 Jintang Highway, Tianjin 300170, Peoples R China