[1] Mahidol Univ, Ramathibodi Hosp, Fac Med, Div Dev & Behav Pediat,Dept Pediat, Bangkok, Thailand
[2] Mahidol Univ, Ramathibodi Hosp, Fac Med, Div Pediat Neurol,Dept Pediat, Bangkok, Thailand
[3] Ramathibodi Hosp, Sect Clin Epidemiol & Biostat, Bangkok, Thailand
[4] Natl Elect & Comp Technol Ctr, Pathum Thani, Thailand
[5] Phramongkutklao Hosp, Div Dev & Behav Pediat, Bangkok, Thailand