1. From the Departments of Psychology (T.K.S.C., E.R.G., N.Z., A.C.D.) and Neuroscience (A.C.D.) and the Institute of Behavioral Medicine Research (A.C.D.), The Ohio State University, Columbus; Department of Anesthesiology and Critical Care Medicine (N.S., T.O.), Johns Hopkins Hospital, Baltimore, Md; the Departments of Neurology and Neuroscience (L.D.M.), University of Connecticut Health Center, Farmington; and the Department of Anesthesiology (P.D.H.), Oregon Health Sciences University, Portland.