1. Cleveland FES Center, Cleveland, Ohio, USA
2. Louis Stokes Cleveland VA Medical Center, Cleveland, Ohio, USA
3. School of Physical Therapy and Rehabilitation Sciences, University of South Florida, Florida, USA
4. Department of Orthopedics, MetroHealth Medical Center, Cleveland, Ohio, USA
5. Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA
6. Cleveland State University, Cleveland, Ohio, USA