[1] Sørlandet Hospital HF,Department of Paediatrics
[2] Faculty of Medicine,Department of Paediatrics
[3] University of Oslo,Division of Epidemiology
[4] Ullevaal,Department of Nutrition
[5] Oslo University Hospital,undefined
[6] Norwegian Institute of Public Health,undefined
[7] Institute of Basic Medical Sciences,undefined
[8] University of Oslo,undefined
[9] Institute of Health and Society,undefined
[10] University of Oslo,undefined