1. The Central Arkansas Veterans Healthcare System (V.V., A.Y.-B., N.R., A.M.B., B.P., T.S., L.M.K., P.A.K.), University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205
2. Department of Medicine (M.-J.L., S.K.F.), University of Maryland, Baltimore, Maryland 21201
3. the Department of Medicine, Division of Endocrinology, and the Department of Biostatistics (H.J.S.), University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205
4. the Department of Pediatrics (R.E.M.), University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205
5. Geriatric Research Education and Clinical Center, and Veterans Affairs Medical Center (S.K.F.), Baltimore, Maryland 21201