[1] Mahidol Univ, Ramathibodi Hosp, Fac Med, Dept Pediat, Bangkok 10400, Thailand
[2] Mahidol Univ, Ramathibodi Hosp, Fac Med, Res Ctr, Bangkok 10400, Thailand
[3] Mahidol Univ, Ramathibodi Hosp, Fac Med, Dept Radiol, Bangkok 10400, Thailand
[4] Mahidol Univ, Ramathibodi Hosp, Fac Med, Dept Med, Bangkok 10400, Thailand