1. Child and Adolescent Mental Health Centre, Mental Health Services, Capital Region of Denmark.
2. VIRTU Research Group, Copenhagen Research Center for Mental Health—CORE, Mental Health Center Copenhagen, Mental Health Services, Capital Region of Denmark, Copenhagen University Hospital, Hellerup, Denmark.
3. The Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark.
4. Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.