[1] Yonsei Univ, Wonju Coll Med, Dept Internal Med, Wonju, South Korea
[2] Yonsei Univ, Coll Med, Dept Internal Med, Seoul, South Korea
[3] Soonchunhyang Univ, Bucheon Hosp, Dept Internal Med, Bucheon, South Korea
[4] Natl Canc Ctr, Ctr Liver & Pancreatobiliary Canc, Goyang, South Korea
[5] Konyang Univ, Coll Med, Dept Internal Med, Daejeon, South Korea
[6] Keimyung Univ, Sch Med, Dept Internal Med, Daegu, South Korea
[7] Eulji Univ, Nowon Eulji Med Ctr, Sch Med, Dept Internal Med, Seoul, South Korea
[8] Seoul Natl Univ, Seoul Natl Univ Hosp, Coll Med, Dept Pathol, Seoul, South Korea
[9] Hanyang Univ, Coll Med, Dept Internal Med, Seoul, South Korea
[10] Catholic Univ Korea, Coll Med, Dept Radiol, Seoul St Marys Hosp, Seoul, South Korea
[11] Catholic Univ Korea, Coll Med, Dept Internal Med, St Vincents Hosp, Seoul, South Korea
[12] Seoul Natl Univ, Coll Med, Seoul Metropolitan Govt Boramae Med Ctr, Dept Internal Med, Seoul, South Korea
[13] Soonchunhyang Univ, Seoul Hosp, Coll Med, Dept Internal Med, Seoul, South Korea
[14] Yonsei Univ, Severance Childrens Hosp, Dept Pediat, Div Gastroenterol Hepatol & Nutr,Coll Med, Seoul, South Korea
[15] CHA Univ, CHA Bundang Med Ctr, Div Pediat Gastroenterol Hepatol & Nutr, Seongnam, South Korea
[16] Inha Univ, Inha Univ Hosp, Sch Med, Dept Internal Med, Incheon, South Korea
[17] Sungkyunkwan Univ, Kangbuk Samsung Hosp, Dept Internal Med, Div Gastroenterol & Hepatol,Sch Med, 29 Saemunan Ro, Seoul 03181, South Korea