1. Child and Adolescent Mental Health Center, Mental Health Services in the Capital Region of Denmark Glostrup Denmark
2. Department of Clinical Medicine, Faculty of Health and Medical SciencesUniversity of Copenhagen Copenhagen Denmark
3. Department of Child and Adolescent PsychiatryInstitute of Psychiatry Psychology and Neuroscience, King's College London London
4. Research Clinic for Functional Disorders and PsychosomaticsAarhus University Hospital Aarhus Denmark
5. Child and Adolescent Psychiatric Centre RisskovAarhus University Hospital Aarhus Denmark
6. Department of Public HealthUniversity of Copenhagen Copenhagen Denmark
7. National Institute of Public HealthUniversity of Southern Denmark Odense Denmark
8. Department of Psychiatry and PsychologyMaastricht University Medical Centre Maastricht The Netherlands
9. Department of Psychiatry, Brain Center Rudolf MagnusUniversity Medical Centre Utrecht Utrecht the Netherlands