1. From the Laboratory of Physiologic Studies, National Institute on Alcohol Abuse & Alcoholism, National Institutes of Health, Bethesda, Md (S.B., P.P., D.O-H., S.R., J.L., J.H.-W., L.O., G.K.); the Department of Physiology, University of Washington, Seattle, Wash (K.M.); and the Cardiovascular Disease Research Program, North Carolina Central University, Durham, NC (M.A.R., R.D.B).