1. Beta Cell Biology, Novo Nordisk A/S (A.B.D., H.K.), Novo Allé, DK-2880 Bagsvaerd, Denmark
2. The Department Physiology, University of British Columbia (A.M.J.B.), Vancouver, British Columbia, Canada V6T 1Z3
3. The Department of Medical Physiology, The Panum Institute, University of Copenhagen (J.J.H.), DK-2200 Copenhagen N, Denmark