1. Department of Child and Adolescent Psychiatry Copenhagen University Hospital ‐ Psychiatry Region Zealand Copenhagen Denmark
2. Department of Clinical Medicine, Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark
3. National Centre for Register‐based Research, Aarhus BSS Aarhus University Aarhus Denmark
4. Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH) Aarhus University Aarhus Denmark
5. Centre for Integrated Register‐based Research (CIRRAU) Aarhus University Aarhus Denmark
6. Division of Child and Adolescent Psychiatry, Department of Psychiatry University Hospital Lausanne, University of Lausanne Lausanne Switzerland
7. Department of Psychiatry University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
8. Department of Nutrition University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
9. Department of Medical Epidemiology and Biostatistics Karolinska Institutet Stockholm Sweden