[1] Seoul Natl Univ Hosp, Hosp Med Ctr, Seoul KS013, South Korea
[2] Seoul Natl Univ Hosp, Dept Pediat, Seoul KS013, South Korea
[3] Chungnam Natl Univ, Chungnam Natl Univ Hosp, Sch Med, Dept Pediat, Daejeon KS015, South Korea
[4] Chonnam Natl Univ, Chonnam Natl Univ Hosp, Med Sch, Dept Pediat, Gwangju KS018, South Korea
[5] Sungkyunkwan Univ, Samsung Changwon Hosp, Sch Med, Dept Pediat, Chang Won KS011, South Korea
[6] Yongin Severance Hosp, Dept Pediat, Yongin KS009, South Korea
[7] Inje Univ, Sanggye Paik Hosp, Dept Pediat, Asthma & Allergy Ctr, Seoul KS013, South Korea
[8] Univ Ulsan, Gangneung Asan Hosp, Dept Pediat, Kangnung KS007, South Korea
[9] Pusan Natl Univ, Childrens Hosp, Dept Pediat, Yangsan KS011, South Korea
[10] Soonchunhyang Univ, Seoul Hosp, SCH Biomed Informat Res Unit, Seoul KS013, South Korea
[11] Dankook Univ, Dankook Univ Hosp, Med Sch, Dept Pediat, Cheonan KS002, South Korea
[12] Sungkyunkwan Univ, Kangbuk Samsung Hosp, Sch Med, Dept Pediat, Seoul KS013, South Korea
[13] Soonchunhyang Univ, Gumi Hosp, Dept Pediat, Gumi KS010, South Korea
[14] Korea Univ, Guro Hosp, Coll Med, Dept Pediat, Seoul KS013, South Korea
[15] Eulju Univ, Eulji Gen Hosp, Dept Pediat, Seoul KS013, South Korea
[16] Korea Canc Ctr Hosp, Dept Pediat, Seoul KS013, South Korea
[17] Univ Ulsan, Asan Med Ctr, Coll Med, Dept Pediat, Seoul KS013, South Korea
[18] Hanyang Univ, Guri Hosp, Coll Med, Dept Pediat, Guri KS013, South Korea
[19] Ilsan Hosp, Natl Hlth Insurance Serv, Dept Pediat, Goyang KS007, South Korea
[20] Catholic Univ Korea, Sch Med, Dept Pediat, Daegu KS002, South Korea
[21] Dongguk Univ, Gyeongju Hosp, Dept Pediat, Gyeongju KS010, South Korea
[22] CHA Univ, CHA Bundang Med Ctr, Sch Med, Dept Pediat, Seongnam KS009, South Korea
[23] Catholic Univ Korea, Coll Med, Dept Pediat, Seoul KS013, South Korea
[24] Soonchunhyang Univ, Seoul Hosp, Coll Med, Dept Pediat, Seoul KS013, South Korea