1. Centre for Child Development and Behavior for the Primary Health Care of the Capital Area, Reykjavik, Iceland
2. Department of Child and Adolescent Psychiatry, Landspítali University Hospital, Reykjavík, Iceland
3. State Diagnostic and Counselling Centre, Kopavogur, Iceland
4. Faculty of Psychology, University of Iceland
5. Municipal Service Centres Breiðholts, Reykjavík, Iceland
6. Department of Child and Adolescent Psychiatry, Aarhus University Hospital Psychiatry, Aarhus, Denmark