[1] CHA Univ, CHA Med Ctr, Dept Pediat, Sch Med, Seoul, South Korea
[2] CHA Univ, Dept Pediat, Sch Med, Seoul, South Korea
[3] Myongji Hosp, Dept Pediat, Gyeonggi Do, South Korea
[4] Gangdong Kyung Hee Univ Hosp, Seoul, South Korea
[5] Bundang Jaesaeng Hosp, Dept Pediat, Songnam, South Korea
[6] CHA Univ, Sch Med, Dept Pediat, Songnam, South Korea
[7] Catholic Univ Korea, Uijeongbu St Marys Hosp, Dept Pediat, Coll Med, Uijongbu, Gyeonggi Do, South Korea