1. From the Divisions of Comparative Medicine (K.C., N.D.R., L.D.M.) and Neuroscience (K.C., G.A.D., M.D.N., V.C.C.C., C.K.), Oregon National Primate Research Center, Beaverton, Oregon; and Departments of Behavioral Neuroscience (D.F.) and Anesthesiology and Perioperative Medicine (A.M.B.), Oregon Health and Science University, Portland, Oregon.