1. Department of Physical Medicine and Rehabilitation, MetroHealth Medical Center, Cleveland, OH, USA,
2. Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA,
3. Department of Physical Medicine and Rehabilitation, Baylor College of Medicine, Houston, TX, USA,
4. Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, OH, USA, and
5. Departments of Orthopaedics and Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA