1. From the University of Texas Health Science Center (R.L.B., C.L.S., D.L.M.), San Antonio, Tex; the University of Maryland at Baltimore (M.A.W., T.R.P., J.R.H., S.J.K.), The Johns Hopkins University (R.J.W., C.J.E., D.W.B.), Baltimore, Md; Emory University (B.J.S.), Atlanta, Ga; Rush Neuroscience Institute (M.A.S.), Chicago, Ill; Tulane University School of Public Health and Tropical Medicine (R.S.), New Orleans, La; Baltimore VA Medical Center (R.F.M.), Baltimore, Md; and Neurological Medicine (C.J...