[1] Pusan Natl Univ, Sch Med, Dept Pediat, Busan, South Korea
[2] Dept Anesthesia & Pain Med, Busan, South Korea
[3] Pusan Natl Univ, Busan, South Korea
[4] Pusan Natl Univ, Coll Med, Busan, South Korea
[5] Pusan Natl Univ, Dept Nucl Med, Coll Med, Yangsan 50612, South Korea
[6] Pusan Natl Univ Hosp, Dept Internal Med, Busan, South Korea
[7] Pusan Natl Univ Hosp, Biomed Res Inst, Busan, South Korea