1. Department of Endocrinology and Internal Medicine, Aarhus University Hospital and Medical Research Laboratory, Institute of Clinical Research, Aarhus University, Aarhus, Denmark.
2. Department of Health Science and Technology, Aalborg University, Aalborg, Denmark.
3. Steno Diabetes Center, Department of Clinical Epidemiology, Aarhus University and Nordsjaellands Hospitaler Hilleroed, Hillerød, Denmark.