[1] Seoul Natl Univ, Bundang Hosp, Seongnam, South Korea
[2] Univ Ulsan, Coll Med, Asan Med Ctr, Pediat, Seoul, South Korea
[3] Yonsei Univ, Coll Med, Pediat, Seoul, South Korea
[4] Seoul Natl Univ, Coll Med, Pediat, Seoul, South Korea
[5] Samsung Med Ctr, Dept Pediat, Seoul, South Korea
[6] Sungkyunkwan Univ, Dept Pediat, Samsung Med Ctr, Seoul, South Korea
[7] Chonnam Natl Univ, Hwasun Hosp, Pediat, Gwangju, South Korea
[8] Dongnam Inst Radiol & Med Sci, Pediat, Busan, South Korea
[9] Pusan Natl Univ, Childrens Hosp, Sch Med, Dept Pediat, Yangsan, South Korea
[10] Catholic Univ Korea, Coll Med, Pediat, Seoul, South Korea
[11] Natl Canc Ctr, Pediat, Goyang, South Korea
[12] Korea Univ, Med Ctr, Pediat, Seoul, South Korea
[13] Inha Univ Hosp, Coll Med, Pediat, Incheon, South Korea
[14] Kyungpook Natl Univ, Sch Med, Pediat, Daegu, South Korea
[15] Inje Univ, Haeundae Paik Hosp, Pediat, Busan, South Korea
[16] Jeonbuk Natl Univ, Sch Med, Pediat, Jeonju, South Korea
[17] Univ Ulsan, Coll Med, Pediat, Ulsan, South Korea
[18] Gyeongsang Natl Univ, Sch Med, Pediat, Jinju, South Korea
[19] Keimyung Univ, Dongsan Hosp, Sch Med, Dept Pediat, Daegu, South Korea
[20] Ewha Womans Univ, Coll Med, Pediat, Seoul, South Korea
[21] Chungnam Natl Univ, Coll Med, Pediat, Daejeon, South Korea
[22] Kyung Hee Univ, Coll Med, Pediat, Seoul, South Korea
[23] Dankook Univ, Coll Med, Pediat, Cheonan, South Korea
[24] Yeungnam Univ, Coll Med, Dept Pediat, Daegu, South Korea
[25] Gachon Univ, Gil Med Ctr, Pediat, Incheon, South Korea
[26] Sungkyunkwan Univ, Kangbuk Samsung Hosp, Sch Med, Dept Pediat, Seoul, South Korea
[27] Dong A Univ, Coll Med, Pediat, Busan, South Korea
[28] Seoul Natl Univ, Bundang Hosp, Med Res Collaborating Ctr, Seongnam, South Korea