[1] Sungkyunkwan Univ, Sch Med, Dept Pediat, Samsung Med Ctr, Seoul, South Korea
[2] Esoo Hosp, Digest Endoscop Ctr, Cheonan Si, South Korea
[3] Kangbuk Samsung Hosp, Dept Internal Med, Seoul, South Korea
[4] Seoul Song Do Colorectal Hosp, Dept Internal Med, Seoul, South Korea
[5] Kyung Hee Univ, Coll Med, Dept Internal Med, Seoul, South Korea
[6] Sungkyunkwan Univ, Sch Med, Dept Internal Med, Samsung Med Ctr, Seoul, South Korea
[7] Chung Ang Univ, Coll Med, Dept Internal Med, Seoul, South Korea
[8] Hanyang Univ, Coll Med, Dept Internal Med, Guri Hosp, Guri, South Korea
[9] CELLTRION Inc, Incheon, South Korea