1. VA RR&D Center for the Medical Consequences of Spinal Cord Injury, James J. Peters VAMC, Bronx, NY, USA
2. Department of Medicine, The Icahn School of Medicine at Mount Sinai, New York, NY, USA
3. Department of Rehabilitation Medicine, The Icahn School of Medicine at Mount Sinai, New York, NY, USA
4. Department of Health, Sport and Exercise Sciences, The University of Kansas, Lawrence, KS, USA
5. The Medical Service, James J. Peters VAMC, Bronx, NY, USA