1. Department of Paediatric and Adolescent Medicine Drammen Hospital, Vestre Viken Hospital Trust Drammen Norway
2. Lovisenberg Diaconal University College Oslo Norway
3. Department of Neonatology Haukeland University Hospital Norway
4. Department of Neonatology Oslo University Hospital Norway
5. Department of Nursing Science University of Turku Finland
6. School of Health and Welfare Dalarna University Sweden