1. Department of Clinical ResearchUniversity Hospital of North Norway Tromsø Norway
2. Department of Health and Care Sciences, Faculty of Health SciencesUiT The Arctic University of Norway Tromsø Norway
3. Department of Community Medicine, Faculty of Health SciencesUiT The Arctic University of Norway Tromsø Norway
4. Department of Microbiology and Infection ControlUniversity Hospital of North Norway Tromsø Norway
5. Department of Paediatrics,Finnmark Hospital Trust Hammerfest Norway
6. Childhood Nutrition Research Centre, UCL Great Ormond StreetInstitute of Child Health London UK
7. Division of Neurosciences, Orthopedics and Rehabilitation ServicesUniversity Hospital of North Norway Tromsø Norway