1. Department of Chronic Diseases and Ageing, Norwegian Institute of Public Health, Oslo, Norway
2. Hormone Laboratory, Department of Medical Biochemistry, Oslo University Hospital, Aker, Oslo, Norway
3. Barbara Davis Center for Diabetes, University of Colorado, Anschutz Medical Campus, Aurora, CO
4. Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
5. Department of Immunology, Rikshospitalet, Oslo University Hospital, Oslo, Norway
6. Department of Medical Genetics, University of Oslo, Oslo, Norway
7. Department of Pediatric and Adolescent Medicine, Haukeland University Hospital, Bergen, Norway
8. KG Jebsen Center for Diabetes Research, Department of Clinical Science, University of Bergen, Bergen, Norway
9. Institute of Clinical Medicine, University of Oslo, Oslo, Norway
10. Department of Congenital Disorders, Statens Serum Institut, Copenhagen, Denmark
11. Department of Pediatrics, Østfold Hospital Trust, Grålum, Norway