1. Department of Behavioural Medicine, Institute of Basic Medical Sciences, Faculty of Medicine University of Oslo Oslo Norway
2. Department for Postgraduate Studies Lovisenberg Diaconal University College Oslo Norway
3. Department of Paediatric Haematology and Oncology, Division for Paediatric and Adolescent Medicine Oslo University Hospital, Rikshospitalet Oslo Norway
4. Department of Pediatrics and Adolescents Medicine University Hospital Rigshospitalet Copenhagen Denmark
5. Regional Centre for Child and Adolescent Mental Health Eastern and Southern Norway (RBUP) Oslo Norway
6. Institute of Clinical Medicine, Faculty of Medicine University of Oslo Oslo Norway
7. Faculty of Health Sciences, The University of Copenhagen and The Pediatric Clinic, Juliane Marie Centre Rigshospitalet Copenhagen Denmark