1. Human Engineering Research Laboratories, VA Pittsburgh Healthcare System, Pittsburgh, PA, USA
2. Human Engineering Research Laboratories, School of Health and Rehabilitation Sciences, Pittsburgh, PA, USA
3. Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, USA
4. Department of Physical Medicine and Rehabilitation, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
5. Department of Occupational Therapy, University of Florida, Florida, FL, USA