[1] Johns Hopkins Univ, Kennedy Keieger Inst, Dept Neuropsychol, Baltimore, MD 21205 USA
[2] Johns Hopkins Univ, Dept Psychiat, Baltimore, MD 21205 USA
[3] Johns Hopkins Univ, Sch Med, Dept Emergency Med, Baltimore, MD 21205 USA
[4] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Ctr Injury Res & Policy, Baltimore, MD USA
[5] Univ Washington, Sch Med, Dept Rehabil Med, Childrens Hosp & Reg Med Ctr, Seattle, WA 98195 USA
[6] Univ Washington, Sch Med, Dept Pediat, Childrens Hosp & Reg Med Ctr, Seattle, WA 98195 USA
[7] Univ Arkansas Med Sci, Dept Pediat, Coll Med, Little Rock, AR 72205 USA
[8] Univ Penn, Sch Med, Dept Pediat, Philadelphia, PA 19104 USA
[9] Johns Hopkins Univ, Sch Med, Dept Phys Med & Rehabil, Kennedy Krieger Inst, Baltimore, MD USA
[10] Univ Washington, Sch Med, Div Rehabil Psychol, Childrens Hosp & Reg Med Ctr, Seattle, WA USA
[11] Univ S Florida, Coll Med, Dept Surg, Tampa, FL 33612 USA