1. Department of Psychiatry and Behavioral Sciences, University of Texas Health Science Center, San Antonio, TX, USA.
2. Research and Development Service, South Texas Veterans Health Care System, San Antonio, TX, USA.
3. Department of Physical and Occupational Therapy, Naval Medical Center San Diego, San Diego, CA, USA.
4. Research and Surveillance Division, DoD-VA Extremity Trauma and Amputation Center of Excellence, Defense Health Agency, Falls Church, VA, USA.
5. Department of Ambulatory Care, Central Texas Veterans Health Care System, Austin, TX, USA.
6. Department of Health Sciences, Indiana University School of Health and Human Sciences, Indianapolis, IN, USA.