[1] Inha Univ, Coll Med, Dept Pediat, Inha Univ Hosp, Incheon, South Korea
[2] Dongguk Univ, Dept Pediat, Ilsan Hosp, Goyang, South Korea
[3] Soonchunhyang Univ, Sch Med, Dept Pediat, Bucheon Hosp, Bucheon, South Korea
[4] Ilsan Hosp, Dept Pediat, Natl Hlth Insurance Serv, Goyang, South Korea
[5] Catholic Kwandong Univ, Int St Marys Hosp, Dept Pediat, Incheon, South Korea
[6] Korea Univ, Dept Pediat, Coll Med, Seoul, South Korea
[7] Hanyang Univ, Med Ctr, Dept Pediat, Coll Med, Seoul, South Korea
[8] Sungkyunkwan Univ, Kangbuk Samsung Hosp, Dept Pediat, Sch Med, Seoul, South Korea
[9] CHA Univ, CHA Bundang Med Ctr, Dept Pediat, Seongnam, South Korea
[10] Univ Ulsan, Asan Med Ctr, Dept Pediat, Coll Med, Seoul, South Korea
[11] Hallym Univ, Kangdong Sacred Heart Hosp, Dept Family Med, Coll Med, Seoul, South Korea
[12] Novel Pharma Inc, Dept Clin Dev, Seoul, South Korea