1. Department of Endocrinology (A.C., I.B.P., P.L.), Aalborg University Hospital, DK-9000 Aalborg, Denmark;
2. Endocrine Unit (N.K., H.P.), Medical Clinic I, Bispebjerg Hospital, DK-2400 Copenhagen, Denmark;
3. Department of Internal Medicine (L.O.), Slagelse Hospital, DK-4200 Slagelse, Denmark;
4. National Food Institute (L.B.R.), Technical University of Denmark, DK-2800 Copenhagen, Denmark