[1] Xi An Jiao Tong Univ, Sch Basic Med Sci, Dept Physiol & Pathophysiol, Hlth Sci Ctr, Xian 710061, Peoples R China
[2] Xi An Jiao Tong Univ, Affiliated Hosp 2, Dept Ultrasound, Xian 710004, Peoples R China
[3] Xi An Jiao Tong Univ, Basic Med Expt Teaching Ctr, Hlth Sci Ctr, Sch Basic Med Sci, Xian 710061, Peoples R China
[4] Xi An Jiao Tong Univ, Inst Endem Dis, Hlth Sci Ctr, Sch Publ Hlth, Xian 710061, Peoples R China