1. From the Experimental Cardiovascular Medicine Division (B.C., A.C., P.M., and C.E.), the Microvascular Research Laboratories (O.A.S. and D.O.B.) and the Henry Wellcome Laboratories for Integrative Neuroscience and Endocrinology (D.D.) of the University of Bristol, Bristol, England, UK; and the Department of Pathology (N.I. and M.R.), University of Washington, Seattle.