1. Emory University, and Rehabilitation R&D Center of Excellence, Atlanta VAMC, Atlanta, GA, USA
2. Moss Rehabilitation Research Institute, Philadelphia, PA, USA
3. NINDS, NIH, Bethesda, MD, USA
4. Johns Hopkins University, Baltimore, MD, USA
5. Washington University School of Medicine, St Louis, MO, USA
6. Washington University in St. Louis, St Louis, MO, USA
7. James S. McDonnell Foundation, St Louis, MO, USA