1. Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta (H.J.J., M. Mackasey, Y.L., J.K., A.W.K., R.A.R.), Cumming School of Medicine, University of Calgary, Alberta.
2. Department of Physiology and Pharmacology (H.J.J., M. Mackasey, Y.L., J.K., A.W.K., R.A.R.), Cumming School of Medicine, University of Calgary, Alberta.
3. Department of Physiology and Biophysics, Dalhousie University, Halifax, Nova Scotia (M. Moghtadaei, E.E.E., S.A.R.).
4. Department of Medicine, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada (J.M.T.).