1. Departments of Physiology and Biophysics (A.S.W., R.C.D., L.N.T., R.S.R.), Dalhousie University, Halifax, Nova Scotia, Canada, B3H 4H7
2. Biochemistry (C.B.L.), Dalhousie University, Halifax, Nova Scotia, Canada, B3H 4H7
3. Medicine (R.S.R.), Dalhousie University, Halifax, Nova Scotia, Canada, B3H 4H7