1. Department of Endocrinology and Internal Medicine; Aarhus University Hospital; Aarhus Denmark
2. Department of Medicine; Viborg Regional Hospital; Aarhus Denmark
3. Department of Medicine; Section Endocrinology; Leiden University Medical Center; Leiden The Netherlands
4. Department of Clinical Epidemiology; Aarhus University Hospital; Aarhus Denmark
5. Department of Clinical Epidemiology; Leiden University Medical Center; Leiden The Netherlands
6. Centre for Diabetes Research; Gentofte University Hospital; Hellerup Denmark