[1] Univ Texas Southwestern Med Ctr Dallas, Dept Phys Med & Rehabil, CS6-110,5161 Harry Hines Blvd, Dallas, TX 75390 USA
[2] Univ Texas Med Branch, Div Rehabil Sci, Galveston, TX 77555 USA
[3] Jonkoping Univ, CHILD Res Grp, Jonkoping, Sweden
[4] Jonkoping Univ, Res Sch Hlth & Welf, Sch Hlth Sci, Jonkoping, Sweden
[5] Shriners Burn Hosp, Shriners Hosp Children, Galveston, TX USA
[6] Univ Texas Med Branch, Dept Surg, Galveston, TX 77555 USA
[7] Univ Texas Med Branch, Dept Psychiat & Behav Sci, Galveston, TX 77555 USA
[8] Univ N Carolina, Sch Educ FPG Child Dev Inst, Chapel Hill, NC USA
[9] Univ N Carolina, FPG Child Dev Inst, Chapel Hill, NC USA