1. From Emory University, Atlanta, Ga (J.B., A.K., V.G., A.L.S., V.V., P.W.F.W.); Pennsylvania State University, Hershey, Pa (R.B.); University of Lausanne, Lausanne, Switzerland (N.R.); National Institute of Aging, National Institutes of Health, Bethesda, Md (M.G., T.B.H.); University of California San Francisco, San Francisco, Calif (D.C.B.); University of Memphis, Memphis, Tenn (S.S.); University of Pittsburgh, Pittsburgh, Pa (A.B.N.); Wake Forest University, Winston Salem, SC (S.B.K.).