1. Department of Paediatrics, Hvidovre University Hospital, Hvidovre, Denmark
2. Section of Epidemiology, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
3. Population Health Unit, Finnish Institute for Health and Welfare, Helsinki, Finland
4. Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
5. Department of Social Work, Child Welfare and Social Policy, Oslo Metropolitan University, Norway
6. Section of Biostatistics, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
7. Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
8. PEDEGO Research Unit, MRC Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
9. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
10. Department of Research, Innovation, and Education and Children’s Clinic, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
11. Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong Special Administrative Region, China
12. Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, New York
13. Seaver Autism Center for Research and Treatment at Mount Sinai, New York, New York
14. Department of Psychology and Centre of Early Life, University of Warwick, Coventry, United Kingdom