1. Veterans Health Administration Rocky Mountain Mental Illness Research Education and Clinical Center, Aurora, Colorado, USA
2. Department of Physical Medicine and Rehabilitation, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
3. Department of Psychiatry, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
4. Department of Neurology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
5. Department of Orthopedics, Physical Medicine and Rehabilitation, Rady Children’s Hospital, University of California San Diego, San Diego, California, USA