[1] Inje Univ, Ilsan Paik Hosp, Internal Med, Gimhae, South Korea
[2] Seoul Natl Univ, Bundang Hosp, Coll Med, Dept Internal Med, Seoul, South Korea
[3] Inst Pasteur Korea, Seongnam, South Korea
[4] Yonsei Univ, Coll Med, Yonsei Liver Ctr, Severance Hosp,Dept Internal Med, Seoul, South Korea
[5] Seoul Natl Univ, Bundang Hosp, Precis Med Ctr, Seoul, South Korea
[6] Inje Univ, Busan Paik Hosp, Internal Med, Gimhae, South Korea
[7] Chonnam Natl Univ, Med Sch, Dept Internal Med, Gwangju, South Korea
[8] Bucheon Soonchunhyang Univ Hosp, Dept Internal Med, Bucheon, South Korea
[9] Chungnam Natl Univ Hosp, Internal Med, Daejeon, South Korea
[10] Keimyung Univ, Internal Med, Daegu, South Korea