[1] Univ Washington, Seattle, WA USA
[2] Hepatol Univ Washington, Div Gastroenterol, Seattle, WA USA
[3] Natl Univ Singapore, Natl Univ Hosp, Yong Loo Lin Sch Med, Div Gastroenterol & Hepatol,Dept Med, Singapore, Singapore
[4] Hepatol Nagoya Univ, Grad Sch Med, Div Gastroenterol, Nagoya, Japan
[5] Stanford Univ, Med Ctr, Div Gastroenterol & Hepatol, Palo Alto, CA USA
[6] Stanford Univ, Med Ctr, 780 Welch Rd, Palo Alto, CA 94304 USA