1. Division of Rehabilitation Sciences, University of Texas Medical Branch (UTMB), Galveston
2. Department of Preventive Medicine and Community Health, UTMB
3. RTI International, Washington, DC, and Rehabilitation Institute of Chicago, Chicago, Illinois
4. Department of Occupational Therapy, UTMB
5. Uniform Data System for Medical Rehabilitation, Buffalo, New York6Department of Medicine, University at Buffalo, Buffalo, New York