[1] Chosun Univ, Coll Med, Dept Internal Med, Gwangju, South Korea
[2] Ajou Univ, Dept Gastroenterol, Sch Med, Suwon, South Korea
[3] Korea Univ, Guro Hosp, Dept Internal Med, Coll Med, Seoul, South Korea
[4] Catholic Univ Korea, St Vincents Hosp, Dept Internal Med, Seoul, South Korea
[5] Seoul Natl Univ, Dept Internal Med, Coll Med, 101 Daehak Ro, Seoul 03080, South Korea
[6] Seoul Natl Univ, Liver Res Inst, Coll Med, 101 Daehak Ro, Seoul 03080, South Korea