1. From the North Shore Heart Research Group (G.A.F., C.-C.L., E.J.H., C.N.W., K.K.M.C., H.H.R.), Kolling Institute, University of Sydney, Australia; Department of Cardiology (G.A.F., A.G., K.K.M.C., H.H.R.), Royal North Shore Hospital, Sydney, Australia; Department of Pharmacology and Toxicology (S.B., K.G.), University of Lausanne, Switzerland; and Department of Physiology and Biophysics (F.C.), Aarhus University, Denmark.