1. Department of Nutrition (W.M.M., K.L.S., J.S.S., P.J.H.), School of Medicine, University of California, Davis, California 95616
2. Department of Pediatrics (F.M.G., C.H.W.), School of Medicine, University of California, Davis, California 95616
3. Neurobiology of Aging Laboratories, Mount Sinai School of Medicine (C.V.M., T.M.M.), New York, New York 10021