1. Rehabilitation Medicine; University of Washington; Seattle Washington U.S.A
2. Health Promotion Research Center; University of Washington; Seattle Washington U.S.A
3. Neurology Vocational Services Unit; University of Washington; Seattle Washington U.S.A
4. Neurological Surgery; University of Washington; Seattle Washington U.S.A
5. Neurology; University of Washington; Seattle Washington U.S.A
6. Psychiatry and Behavioral Sciences; University of Washington; Seattle Washington U.S.A
7. Biostatistics; University of Washington; Seattle Washington U.S.A
8. Swedish Neuroscience Institute; Seattle Washington U.S.A