[1] Seoul Natl Univ, Childrens Hosp, Dept Pediat, 101 Daehak Ro, Seoul 03080, South Korea
[2] Seoul Natl Univ, Bundang Hosp, Dept Pediat, Seongnam, South Korea
[3] Seoul Natl Univ, Coll Med, Dept Pediat, Seoul, South Korea
[4] Uijeongbu Eulji Med Ctr, Dept Pediat, Uijeongbu Si, South Korea
[5] Seoul Natl Univ, Coll Med, Med Res Ctr, Kidney Res Inst, Seoul, South Korea
[6] Seoul Natl Univ, Wide River Inst Immunol, Hongcheon, South Korea