1. Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Trondheim, Norway
2. Department of Research, Innovation, and Education, Children’s Clinic, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
3. Department of Paediatrics, Hvidovre University Hospital, Hvidovre, Denmark
4. Section of Epidemiology, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
5. Department of Public Health Solutions, Finnish Institute for Health and Welfare, Helsinki and Oulu, Finland
6. Department of Public Health and Nursing, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Trondheim, Norway
7. Research Unit for Pediatrics, Pediatric Neurology, Pediatric Surgery, Child Psychiatry, Dermatology, Clinical Genetics, Obstetrics and Gynecology, Otorhinolaryngology, and Ophthalmology, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
8. Children’s Hospital, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
9. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
10. Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong Special Administrative Region
11. Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, New York
12. Seaver Autism Center for Research and Treatment at Mount Sinai, New York, New York