Affiliation: | 1. Department of Rehabilitation Medicine, University of Washington, Seattle, WA;2. Department of Neurology, University of Washington, Seattle, WA;3. Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI;4. Epidemiology Group, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Scotland, United Kingdom;5. Department of Psychology, St. Jude Children''s Research Hospital, Memphis, TN |