Waisman Center (Drs Saiote, Sutter, Dean, and Gillick), Department of Pediatrics (Drs Dean, McAdams, and Gillick), and Department of Medical Physics (Dr Dean), University of Wisconsin–Madison, Madison, Wisconsin; Department of Rehabilitation Medicine (Dr Sutter and Ms Xenopoulos-Oddsson), Department of Pediatrics (Drs Rao and Georgieff), and Division of Biostatistics (Dr Rudser), University of Minnesota, Minneapolis, Minnesota; Department of Physical Therapy and Human Movement Sciences, Department of Pediatrics (Dr Peyton), Northwestern University, Chicago, Illinois.

Bernadette Gillick, PT, MSPT, PhD, Waisman Center, 1500 Highland Ave, Room 421, Madison, WI 53705 ([email protected]).

Grant Support: This work was supported in part by a Promotion of Doctoral Studies I Scholarship from the Foundation for Physical Therapy Research and by the Shepherd Family Trust.

Grant Support: This work is supported by the National Institute of Child Health and Human Development/National Institute of Neurological Disorders and Stroke (7R01HD098202-02).

The authors declare no conflict of interest.

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