1. Hormone Laboratory, Department of Medical Biochemistry and Pharmacology, Haukeland University Hospital, Bergen, Norway
2. Department of Clinical Science, University of Bergen, Bergen, Norway
3. Department of Pediatrics, Haukeland University Hospital, Bergen, Norway
4. Environment and Health, Department of Public Health and Primary Care, KU Leuven, University of Leuven, Leuven, Belgium
5. Department of Radiology, University Hospital of North Norway, Tromsø, Norway
6. Department of Clinical Medicine, University of Tromsø, The Arctic University of Norway, Tromsø, Norway
7. Mohn Nutrition Research Laboratory, Department of Clinical Science, University of Bergen, Bergen, Norway
8. Department of Health Registries, Norwegian Institute of Public Health, Bergen, Norway