[1] Univ Utah, Sch Med, Dept Pediat, 295 Chipeta Way, Salt Lake City, UT 84108 USA
[2] Cerebral Palsy Fdn, New York, NY USA
[3] Holland Bloorview Kids Rehabil Hosp, Toronto, ON, Canada
[4] Univ Toronto, Dept Pediat, Toronto, ON, Canada
[5] Nationwide Childrens Hosp, Grant Morrow III Lib, Columbus, OH USA
[6] Univ Virginia, Sch Med, Dept Pediat, Charlottesville, VA 22908 USA
[7] Nationwide Childrens Hosp, Dept Pediat, Columbus, OH USA
[8] Univ Sydney, Fac Med & Hlth, Discipline Child & Adolescent Hlth, Cerebral Palsy Alliance Res Inst, Sydney, NSW, Australia
[9] Nationwide Childrens Hosp, Ctr Perinatal Res, Columbus, OH USA
[10] Nationwide Childrens Hosp, Dept Clin Therapies, Columbus, OH USA
[11] Univ Cincinnati, Cincinnati Childrens Hosp Med Ctr, Cincinnati, OH USA