[1] Kyungpook Natl Univ, Dept Pediat GI Hepatol, Med Ctr, Daegu, South Korea
[2] Inje Univ, Haeundae Paik Hosp, Dept Pediat GI Hepatol, Busan, South Korea
[3] Samsung Med Ctr, Dept Pediat GI Hepatol, Seoul, South Korea
[4] Seoul Med Ctr, Dept Radiol, Seoul, South Korea