1. Department of Clinical Biochemistry, Aalborg University Hospital, Aalborg, Denmark
2. Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
3. Department of Endocrinology, Aalborg University Hospital, Aalborg, Denmark
4. Steno Diabetes Center North Denmark, Aalborg University Hospital, Aalborg, Denmark
5. Department of Clinical Biochemistry, Viborg Regional Hospital, Viborg, Denmark