[1] Univ Ulsan, Childhood Asthma Atopy Ctr, Coll Med, Dept Pediat,Asan Med Ctr, Seoul, South Korea
[2] Inje Univ, Dept Pediat, Hae Undae Paik Hosp, Coll Med, Pusan, South Korea
[3] Inje Univ, Dept Pediat, Sanggye Paik Hosp, Coll Med, Seoul, South Korea
[4] Hallym Univ, Secred Heart Hosp, Dept Pediat, Anyang, South Korea
[5] Korea Univ, Guro Hosp, Dept Pediat, Seoul, South Korea
[6] Inje Univ, Seoul Paik Hosp, Coll Med, Dept Pediat, Seoul, South Korea
[7] Natl Hlth Insurance Corp Ilsan Hosp, Dept Pediat, Goyang, South Korea
[8] Sungkyunkwan Univ, Kangbuk Samsung Hosp, Coll Med, Dept Pediat, Seoul, South Korea
[9] Yonsei Univ, Coll Med, Gangnam Severance Hosp, Dept Psychiat, Seoul, South Korea