[1] Cedars Sinai Med Ctr, Div Gen Internal Med, Los Angeles, CA USA
[2] Xi An Jiao Tong Univ, Dept Infect Dis, Affiliated Hosp 2, Xian, Peoples R China
[3] Xi An Jiao Tong Univ, Sch Math & Stat, Xian, Peoples R China
[4] Stanford Univ, Dept Epidemiol & Populat Hlth, Med Ctr, Stanford, CA USA
[5] Xi An Jiao Tong Univ, Global Hlth Inst, Sch Publ Hlth, Hlth Sci Ctr, Xian, Peoples R China
[6] Xi An Jiao Tong Univ, Key Lab Environm & Genes Related Dis, Minist Educ China, Xian, Peoples R China
[7] Xi An Jiao Tong Univ, Shaanxi Prov Clin Res Ctr Hepat & Splen Dis, Affiliated Hosp 2, Xian, Peoples R China
[8] Stanford Univ, Div Gastroenterol & Hepatol, Med Ctr, Stanford, CA USA