[1] Univ Washington, Dept Rehabil Med, Box 356490, Seattle, WA 98195 USA
[2] Univ Washington, Dept Rehabil Med, Box 359612, Seattle, WA 98104 USA
[3] VA Puget Sound Healthcare Syst, 1660 S Columbian Way,RCS 117, Seattle, WA 98108 USA
[4] Univ Washington, Dept Neurol Surg, Box 359924, Seattle, WA 98104 USA
[5] Western Washington Med Grp, Dept Psychol, 3525 Colby Ave,Suite 200, Everett, WA 98201 USA