1. Departments of Physiology (P.L.B.), University of Toronto, Toronto, Canada
2. Medicine (P.L.B., P.E., C.-H.T., D.J.D.), University of Toronto, Toronto, Canada
3. Allelix Biopharmaceuticals, Inc. (A.C.), Mississauga, Ontario, Canada
4. Banting and Best Diabetes Center (D.J.D.), University of Toronto, Toronto, Canada