[1] Washington Univ, Dept Neurol, Sch Med, St Louis, MO USA
[2] St Louis Childrens Hosp, St Louis, MO 63178 USA
[3] Univ Toronto, Dept Pediat, Toronto, ON, Canada
[4] Holland Bloorview Kids Rehabil Hosp, Toronto, ON, Canada
[5] Univ Utah, Dept Populat Hlth Sci, Salt Lake City, UT USA
[6] Univ Arizona, Coll Med Phoenix, Dept Child Hlth, Tucson, AZ 85721 USA
[7] Univ Arizona, Coll Med Phoenix, Dept Neurol, Tucson, AZ 85721 USA
[8] Univ Arizona, Coll Med Phoenix, Dept Genet, Tucson, AZ 85721 USA
[9] Univ Arizona, Coll Med Phoenix, Dept Cellular & Mol Med, Tucson, AZ 85721 USA
[10] Phoenix Childrens Hosp, Barrow Neurol Inst, Cerebral Palsy & Pediat Movement Disorders Progra, Mesa, AZ USA
[11] Univ Rochester, Sch Med & Dent, Dept Neurol, Rochester, NY 14627 USA
[12] Cerebral Palsy Res Network, Salt Lake City, UT USA