[1] Stanford Univ, Med Ctr, Dept Med, Palo Alto, CA 94304 USA
[2] Stanford Univ, Med Ctr, Div Gastroenterol & Hepatol, Palo Alto, CA 94304 USA
[3] Univ Calif San Diego, Dept Med, San Diego, CA 92103 USA
[4] Stanford Univ, Sch Med, Ctr Clin Informat, Palo Alto, CA 94304 USA
[5] Shanghai Univ TCM, Shuguang Hosp, Inst Liver Dis, Dept Cirrhosis, Shanghai, Peoples R China
[6] Univ Texas Med Branch, Sch Med, Galveston, TX 77555 USA