[1] Natl Canc Ctr, Ctr Pediat Canc, Dept Pediat, Goyang, South Korea
[2] Yeungnam Univ, Dept Pediat, Coll Med, Daegu, South Korea
[3] Samsung Med Ctr, Dept Pediat, Seoul, South Korea
[4] Kyungpook Natl Univ, Dept Pediat, Sch Med, Daegu, South Korea
[5] Univ Ulsan, Ulsan Univ Hosp, Dept Pediat, Coll Med, Ulsan, South Korea
[6] Hanyang Univ, Dept Pediat, Coll Med, Seoul, South Korea
[7] Keimyung Univ, Dept Pediat, Sch Med, Daegu, South Korea
[8] Chonbuk Natl Univ Hosp, Dept Pediat, Jeonju, South Korea
[9] Chungnam Natl Univ, Dept Pediat, Coll Med, Daejeon, South Korea
[10] Dong A Univ, Dept Pediat, Coll Med, Busan, South Korea
[11] Inje Univ Busan Paik Hosp, Dept Pediat, Busan, South Korea
[12] Inha Univ, Dept Pediat, Coll Med, Incheon, South Korea
[13] Seoul Natl Univ Bundang Hosp, Dept Pediat, Seongnam, South Korea
[14] Daegu Fatima Hosp, Dept Pediat, Daegu, South Korea
[15] Seoul Natl Univ, Canc Res Inst, Dept Pediat, Coll Med, Seoul, South Korea
[16] Dankook Univ, Dept Pediat, Coll Med, 119 Dandae Ro, Cheonan 31116, South Korea