1. Joseph J. Zilber School of Public HealthUniversity of Wisconsin‐Milwaukee Milwaukee Wisconsin
2. Child and Adolescent Mental Health Centre–Mental Health Services Capital Region Copenhagen Region Denmark
3. Psychosis Research UnitAarhus University Hospital Risskov Denmark
4. The Lundbeck Foundation Initiative for Integrative Psychiatric Research, iPSYCH Aarhus Denmark
5. Population Health Sciences, Bristol Medical SchoolUniversity of Bristol Bristol UK
6. Department of EpidemiologyJohns Hopkins Bloomberg School of Public Health Baltimore Maryland
7. Wendy Klag Center for Autism and Developmental DisabilitiesJohns Hopkins Bloomberg School of Public Health Baltimore Maryland
8. Department of Mental HealthJohns Hopkins Bloomberg School of Public Health Baltimore Maryland
9. Department of Public Health, Section for BiostatisticsAarhus University Aarhus Denmark
10. Lundbeck Foundation Initiative for Integrative Psychiatric Research, iPSYCH, National Centre for Register‐based ResearchAarhus University Aarhus Denmark
11. Department of Economics and Business, National Centre for Register‐based ResearchAarhus University Aarhus Denmark
12. Department of Public Health, Section for EpidemiologyAarhus University Aarhus Denmark