1. National Institute for Health and Welfare, Helsinki, Finland
2. PEDEGO Research Unit (Research Unit for Pediatrics, Dermatology, Clinical Genetics, Obstetrics and Gynecology), Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
3. Department of Nursing Science, University of Turku, Turku, Finland
4. Institute of Health Sciences, University of Oulu, Oulu, Finland
5. Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland
6. Children's Hospital, Pediatric Research Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
7. Department of Psychology, University of Warwick, Warwick, United Kingdom
8. NordLab Oulu, Oulu University Hospital, Oulu, Finland
9. Department of Clinical Chemistry, University of Oulu, Oulu, Finland
10. Department of Epidemiology and Biostatistics, MRC–PHE Centre for Environment & Health, School of Public Health, Imperial College London, London, United Kingdom
11. Center for Life Course Health Research, Faculty of Medicine, University of Oulu, Oulu, Finland
12. Biocenter Oulu, University of Oulu, Oulu, Finland
13. Unit of Primary Care, Oulu University Hospital, Oulu, Finland
14. Department of Life Sciences, College of Health and Life Sciences, Brunel University London, Uxbridge, United Kingdom
15. Department of General Practice and Primary Health Care, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
16. Folkhälsan Research Center, Helsinki, Finland
17. Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway