1. Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University, Richmond, Virginia, USA
2. Hunter Holmes McGuire Veterans Affairs Medical Center, Richmond, Virginia, USA
3. Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia, USA
4. Department of Biostatistics, Virginia Commonwealth University, Richmond, Virginia, USA
5. Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, Virginia, USA
6. Department of Neurosurgery, Virginia Commonwealth University, Richmond, Virginia, USA