1. Diabetes Research Division (M.B.C., S.C., T.V., F.K.K.), Department of Medicine, Copenhagen University Hospital Gentofte, Hellerup DK-2900, Denmark
2. Department of Clinical and Molecular Biomedicine (S.C.), University of Catania, 95124 Catania, Italy
3. Department of Biomedical Sciences (J.J.H., M.B.C., F.K.K.), the Panum Institute; University of Copenhagen, DK-2100 Copenhagen, Denmark