1. Division of Mental Health Services, Akershus University Hospital, Lørenskog, Norway;
2. Institute of Clinical Medicine, University of Oslo, Oslo, Norway;
3. Department of Nursing and Health Promotion, Faculty of Health Sciences, Oslo Metropolitan University, Oslo, Norway
4. School of Education and Social Work, University of Sussex, Brighton, United Kingdom;
5. Clinic of Children and Adolescent Medicine, Akershus University Hospital, Lørenskog, Norway;