1. Moss Rehabilitation Research Institute, Elkins Park, PA, USA
2. Department of Rehabilitation Medicine, Mount Sinai School of Medicine, New York, NY, USA
3. Research Department, Craig Hospital, Englewood, CO, USA
4. Department of Cognitive Rehabilitation, JFK-Johnson Rehabilitation Institute, Edison, NJ, USA
5. Departments of Rehabilitation Medicine, Neurology, and Neurological Surgery, University of Washington, School of Medicine, Seattle, WA, USA