[1] Case Western Reserve Univ, Rainbow Babies & Childrens Hosp, Dept Pediat, Cleveland, OH 44106 USA
[2] Case Western Reserve Univ, Rainbow Babies & Childrens Hosp, Div Clin Epidemiol & Biostat, Cleveland, OH 44106 USA
[3] Brown Univ, Rhode Isl Hosp, Sect Behav Pediat, Providence, RI USA
[4] Case Western Reserve Univ, Rainbow Babies & Childrens Hosp, Div Neurol, Cleveland, OH 44106 USA
[5] Baylor Coll Med, Texas Childrens Hosp, Dept Pediat, Houston, TX USA
[6] Baylor Coll Med, Texas Childrens Hosp, Dept Neurol, Houston, TX USA