Table 1. Summary of motion capture data collection equipment and techniques used at each data collection site.

Site	A	B	C
Camera System	10-camera Motion Analysis	8-camera Vicon	18-camera Motion Analysis
Force platforms	AMTI (600 x 900mm)	Bertec (300 x 600mm)	Bertec (600 x 900mm)
Sampling frequency (marker / force)	240 Hz/1200 Hz	240 Hz/1200 Hz	200 Hz/1000 Hz
Data processing software	Motion Analysis Cortex	Vicon Nexus	Motion Analysis Cortex

A, B & C: Cincinnati Children's Hospital, The Ohio State University, and the University of Kentucky, respectively.