From the Division of Pharmacology and Toxicology (L.Y., J.H.M.), Faculty of Pharmaceutical Sciences, The University of British Columbia, Vancouver, Canada; the Division of Cardiology (S.V., A.S.D., T.J.A.), Faculty of Medicine, The University of Calgary, Calgary, Canada; and the Division of Cardiology (S.V., D.J.S.), St Michael’s Hospital, The University of Toronto, Toronto, Canada. (At 2001-02)