1. Human Motor Control Section; National Institutes of Health; Bethesda Maryland USA
2. CNS; IRB; National Institutes of Health; Bethesda Maryland USA
3. Office of the Clinical Director; National Institute of Neurological Disorders and Stroke, National Institutes of Health; Bethesda Maryland USA
4. Functional and Applied Biomechanics Section; Rehabilitation Medicine Department; National Institutes of Health; Bethesda Maryland USA
5. Mount Washington Pediatric Hospital; Washington District of Columbia USA