[1] Soonchunhyang Univ, Coll Med, Dept Pediat, Bucheon, South Korea
[2] Soonchunhyang Univ, Coll Med, Ctr Digest Dis, Bucheon, South Korea
[3] Soonchunhyang Univ, Coll Med, Res Inst, Dept Internal Med, Bucheon, South Korea
[4] Mokpo Hankook Hosp, Dept Lab Med, Mokpo, South Korea
[5] Sungkyunkwan Univ, Sch Med, Dept Lab Med & Clin Genet, Samsung Med Ctr, Seoul, South Korea