1. Reeve-Irvine Research Center, University of California, Irvine, Irvine, California.
2. Department of Dance, University of California, Irvine, Irvine, California.
3. Departments of Neurology, Anatomy & Neurobiology, and Physical Medicine & Rehabilitation, University of California, Irvine, Irvine, California.
4. Division of Occupational Therapy, The Ohio State University Medical Center, Columbus, Ohio.
5. The Sue and Bill Gross Stem Cell Research Center, University of California, Irvine, Irvine, California.