1. Spinal Cord Injury Service and Disorders, Hunter Holmes McGuire VA Medical Center, Richmond, Virginia, USA
2. Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University, Richmond, Virginia, USA
3. Endocrinology Service, Hunter Holmes McGuire VA Medical Center, Richmond, Virginia, USA
4. Endocrinology Division, Virginia Commonwealth University, Richmond, Virginia, USA
5. Department of Physical Medicine and Rehabilitation, Milton S. Hershey Medical Center, Penn State University, Hershey, Pennsylvania, USA