1. From the Departments of Physiology (S.-Y.S., A.E.H., C.J.B., M.C.J., M.O., R.S.R.), Medicine (S.-Y.S., A.E.H., C.J.B., M.O., R.S.R.), Pathology (M.C.F.), and Anesthesia (M.J.); Cardiovascular Research and Mouse Physiology Laboratories (S.-Y.S., A.E.H., C.J.B., M.C.J., M.C.F., M.O., R.S.R.); and Department of Molecular and Medical Pharmacology and Crump Institute for Biological Imaging (T.A.L., D.J.S., S.R.C.), University of California-Los Angeles School of Medicine; Department of Medicine (J.C., K.D...