[1] CHA Univ, Dept Pediat, CHA Bundang Med Ctr, Sch Med, Seongnam, South Korea
[2] Univ Ulsan, Ctr Environm Hlth, Childhood Asthma & Atopy Ctr, Dept Pediat,Asan Med Ctr,Coll Med, Seoul, South Korea
[3] Inje Univ, Coll Med, Seoul Paik Hosp, Dept Pediat, Seoul, South Korea
[4] Konkuk Univ, Dept Pediat, Konkuk Univ Hosp, Sch Med, Seoul, South Korea
[5] Sungkyunkwan Univ, Dept Pediat, Samsung Med Ctr, Sch Med, Seoul, South Korea
[6] Samsung Med Ctr, Environm Hlth Ctr Atop Dis, Seoul, South Korea
[7] Soonchunhyang Univ, Dept Hlth Adm & Management, Coll Med Sci, Asan, South Korea
[8] Dankook Univ, Dept Med Educ, Coll Med, Cheonan, South Korea
[9] Korea Natl Open Univ, Dept Informat & Stat, Seoul, South Korea
[10] Dankook Univ, Dept Prevent Med, Coll Med, Cheonan, South Korea