1. Lawson Research Institute (J.P., E.A., C.C., D.J.H.), St. Joseph’s Health Centre, London, Ontario N6A 4V2, Canada
2. Departments of Physiology (J.P., C.C., D.J.H.), University of Western Ontario, London, Ontario N6A 5A5, Canada
3. Paediatrics (J.P., D.J.H.), University of Western Ontario, London, Ontario N6A 5A5, Canada
4. Laboratoire de Biologie Cellulaire (B.R., C.R., J.J.H.), World Health Organization Collaborating Centre for the Development of the Biology of the Endocrine Pancreas, Université Catholique de Louvain, B-1348 Louvain-La-Neuve, Belgium
5. Medicine (E.A., D.J.H.), University of Western Ontario, London, Ontario N6A 5A5, Canada