1. Human Engineering Research Laboratories, US Department of Veterans Affairs Pittsburgh Healthcare System and University of Pittsburgh, Pittsburgh, Pennsylvania, USA
2. Department of Occupational Therapy, Indiana University Indianapolis, Indianapolis, Indiana, USA
3. Department of Rehabilitation Science and Technology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
4. Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
5. Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA