1. Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
2. Oslo Diabetes Research Centre, Oslo University Hospital, Oslo, Norway
3. Norwegian Institute of Public Health, Oslo, Norway
4. Norwegian Renal Registry, Department of Transplantation Medicine, Oslo University Hospital, Oslo, Norway
5. Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
6. Norwegian Childhood Diabetes Registry, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway