1. Department of Clinical Biochemistry, University of Copenhagen, Rigshospitalet, Denmark;
2. Center for Clinical Metabolic Research, Gentofte Hospital; Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen; and Steno Diabetes Center Copenhagen, Hellerup, Denmark;
3. Department of Clinical Physiology, Bispebjerg Hospital, Steno Diabetes Center, Odense University Hospital, Denmark, Copenhagen, Denmark