1. From the Center of Excellence for Aging & Brain Repair (M.V., J.C., J.N., T.Z., P.R.S., A.E.W.), and the Departments of Neurosurgery (M.V., J.C., J.N., K.R.P., T.Z., P.R.S., A.E.W.), Anatomy (P.R.S., A.E.W.), Pharmacology and Therapeutics (T.B., K.R.P., T.Z., P.R.S., A.E.W.), and Pathology (M.V., P.R.S., A.E.W.), University of South Florida College of Medicine, Tampa, Fla; and Saneron CCEL Therapeutics Inc (C.D.S.), Temple Terrace, Fla.