1. From the Evelyn F. McKnight Center for Age-Related Memory Loss (C.D., S.H.B., C.B.W., T.R., R.L.S.), Department of Neurology, Miller School of Medicine, University of Miami, Miami, Fla; the John T. McDonald Department of Human Genetics (A.B., S.S., L.W., S.H.B., R.L.S.), John P. Hussman Institute for Human; Genomics, Miller School of Medicine, University of Miami, Miami, Fla; and the Department of Epidemiology (C.B.W., T.R., R.L.S.), Miller School of Medicine, University of Miami, Miami, Fla.