1. a VA RR&D Center of Excellence, Atlanta VA Medical Center , Decatur, GA, USA
2. b Department of Rehabilitation Medicine , Emory University School of Medicine , Atlanta, GA, USA
3. c Department of Neurology , Drexel University College of Medicine , Philadelphia, PA, USA
4. d Health Psychology Program, University of the Sciences in Philadelphia , Philadelphia, PA, USA
5. e Department of Psychiatry and Human Behavior , Jefferson Medical College, Thomas Jefferson University , Philadelphia, PA, USA
6. f Drexel University , Philadelphia, PA, USA
7. g Georgia Gwinnett College , Lawrenceville, GA, USA