1. Spinal Cord Injury Service and Disorders, Hunter Holmes McGuire VA Medical Center, Richmond, VA, USA
2. Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University, Richmond, VA, USA
3. College of Health and Human Performance, Virginia Commonwealth University, Richmond, VA, USA
4. School of Kinesiology, College of Health, University of Southern Mississippi, Hattiesburg, MS, USA
5. Department of Physical Medicine and Rehabilitation, Penn State Milton S. Hershey Medical Center, Hershey, PA, USA