1. Department of Pediatric and Adolescent MedicineAkershus University Hospital, Nordbyhagen, Norway
2. Institute for Clinical MedicineCampus Ahus, University of Oslo, Nordbyhagen, Norway
3. Department of Research and DevelopmentDivision of Emergencies and Critical Care, Oslo University Hospital, Oslo, Norway
4. Department of Nursing ScienceInstitute of Health and Society, University of Oslo, Oslo, Norway
5. Department of NutritionInstitute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, Oslo, Norway
6. Department of Haematology, Oslo University Hospital, Oslo, Norway