1. Department of Paediatrics; Oslo University Hospital; Oslo Norway
2. Oslo Diabetes Research Centre; Oslo Norway
3. Division of Epidemiology; Norwegian Institute of Public Health; Oslo Norway
4. Department of Transplant Medicine; Section of Nephrology; Oslo University Hospital; Oslo Norway
5. Metabolic and Renal Research Group; Arctic University of Norway; Tromsø Norway
6. Department of Forensic Pathology and Clinical Forensic Medicine; Norwegian Institute of Public Health; Oslo Norway
7. Oslo Centre for Biostatistics and Epidemiology; Research Support Services; Oslo University Hospital; Oslo Norway
8. Institute of Clinical Medicine; University of Oslo; Oslo Norway
9. KG Jebsen Center for Diabetes Research; Department of Clinical Science; University of Bergen; Bergen Norway
10. Department of Paediatrics; Haukeland University Hospital; Bergen Norway
11. Norwegian Childhood Diabetes Registry; Department of Paediatrics; Oslo University Hospital; Oslo Norway