[1] Seoul Natl Univ, Seoul Natl Univ Hosp, Dept Internal Med, Coll Med, Seoul, South Korea
[2] Seoul Natl Univ, Seoul Natl Univ Hosp, Liver Res Inst, Coll Med, Seoul, South Korea
[3] Korea Univ, Coll Med, Ansan Hosp, Dept Internal Med, Ansan, South Korea
[4] Konkuk Univ, Sch Med, Med Ctr, Dept Internal Med, Seoul, South Korea
[5] Natl Evidence Based Healthcare Collaborating Agcy, Div Hlth Technol Assessment Res, Seoul, South Korea
[6] Kyungpook Natl Univ, Sch Med, Dept Internal Med, Daegu, South Korea
[7] Seoul Natl Univ, Boramae Med Ctr, Dept Internal Med, Seoul Metropolitan Govt,Coll Med, Seoul, South Korea
[8] Yonsei Univ, Dept Internal Med, Coll Med, Seoul, South Korea
[9] Gyeongsang Natl Univ, Coll Med, Dept Internal Med, Changwon Hosp, Chang Won, South Korea
[10] Gachon Univ, Dept Internal Med, Gil Med Ctr, Coll Med, Incheon, South Korea
[11] Pusan Natl Univ, Sch Med, Biomed Res Inst, Pusan Natl Univ Hosp,Dept Internal Med, Busan, South Korea
[12] Catholic Univ Korea, Seoul St Marys Hosp, Coll Med, Dept Internal Med, Seoul, South Korea
[13] Pusan Natl Univ, Pusan Natl Univ Hosp, Biomed Res Inst, Dept Surg,Sch Med, Busan, South Korea
[14] Seoul Natl Univ, Coll Med, Dept Radiol, Seoul Natl Univ Hosp, Seoul, South Korea
[15] Korea Univ, Coll Med, Anam Hosp, Dept Internal Med, Seoul, South Korea