1. From the Health Services Research and Development Service, Roudebush VAMC, Indianapolis, Ind (L.S.W., L.P.); the Departments of Neurology (L.S.W.) and Medicine (E.B., W.T., K.K.), Indiana University School of Medicine, Indianapolis, Ind; Regenstrief Institute, Inc (L.S.W., W.T., H.H., K.K.), Indianapolis, Ind; and the Department of Adult Health, Indiana University School of Nursing, Indianapolis, Ind (T.B.).