[1] Inje Univ, Sanggye Paik Hosp, Dept Pediat, Ctr Asthma & Allergy, Seoul, South Korea
[2] Univ Ulsan, Coll Nat Sci, Sch Biol Sci, Ulsan, South Korea
[3] Seoul Natl Univ, Bundang Hosp, Dept Internal Med, Seongnam, South Korea
[4] Kyung Hee Univ, Sch Med, Kyung Hee Univ Hosp, Dept Pediat, Seoul, South Korea
[5] Univ Ulsan, Coll Med, Asan Med Ctr, Dept Pediat,Childhood Asthma Atopy Ctr,Environm H, Seoul, South Korea
[6] Hanyang Univ, Coll Med, Dept Pediat, Seoul, South Korea
[7] Catholic Univ Korea, Coll Med, Dept Pediat, Seoul, South Korea
[8] Inha Univ Hosp, Dept Pediat, Incheon, South Korea
[9] Busan St Marys Hosp, Dept Pediat, Busan, South Korea
[10] Jeonju Presbyterian Med Ctr, Dept Pediat, Jeonju, South Korea
[11] Rosemary Hosp, Dept Pediat, Daegu, South Korea
[12] Catholic Univ Daegu, Med Ctr, Dept Pediat, Daegu, South Korea
[13] Pusan Natl Univ, Coll Med, Dept Pediat, Busan, South Korea
[14] Good Kang An Hosp, Dept Pediat, Busan, South Korea
[15] Daegu Fatima Hosp, Dept Pediat, Daegu, South Korea
[16] Kyungpook Natl Univ, Sch Med, Dept Pediat, Daegu, South Korea
[17] Inje Univ, Busan Paik Hosp, Dept Pediat, Busan, South Korea
[18] Dong A Univ, Coll Med, Dept Pediat, Busan, South Korea
[19] I Dream Pl Childrens Hosp, Dept Pediat, Daegu, South Korea
[20] Sungkyunkwan Univ, Sch Med, Kangbuk Samsung Hosp, Dept Pediat, Seoul, South Korea
[21] Catholic Univ Korea, Sch Med, Dept Pediat, Seoul, South Korea
[22] Seoul Natl Univ, Coll Med, Dept Pediat, Seoul, South Korea