1. From the Departments of Medicine and Physiology (K.B., A.J.C., M.P., P.H.B., G.Y.O., R.G.T.), Heart and Stroke/Richard Lewar Centre of Excellence (P.H.B., G.Y.O., R.G.T.), and Division of Cardiology (P.H.B., G.Y.O., R.G.T.), University of Toronto, Ontario, Canada; Department of Biology (S.S., R.G.T.), York University, Toronto, Ontario, Canada; Novartis Institutes for Biomedical Research (S.I.); and Institute of Molecular Biotechnology (J.M.P.), Austrian Academy of Sciences. Present address for G.Y.O...