1. Department of Internal Medicine F (T.V., F.K.K., T.K.), Gentofte Hospital, DK-2900 Hellerup, Denmark;
2. Department of Medical Physiology (T.V., J.J.H.), The Panum Institute, University of Copenhagen, DK-2200 Copenhagen N, Denmark;
3. Steno Diabetes Center (A.J., T.H., O.P.), DK 2820 Gentofte, Copenhagen, Denmark;
4. Department of Endocrinology (S.M.), Hvidovre Hospital, DK-2650 Hvidovre, Denmark;
5. Department of Gastroenterology (S.L.), Glostrup Hospital, DK-2600 Glostrup, Denmark