1. Department of Public Health Solutions, National Institute for Health and Welfare, Helsinki and Oulu, Finland
2. Children’s Hospital, University of Helsinki and Helsinki University Hospital, Finland
3. Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Finland
4. Institute of Health Sciences, University of Oulu, Oulu, Finland
5. PEDEGO Research Unit, MRC Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
6. Department of Psychology, University of Warwick, Warwick, United Kingdom
7. School of Public Health, Faculty of Medicine, Imperial College, London, United Kingdom
8. Department of General Practice and Primary Health Care, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
9. Vasa Central Hospital, Vasa, Finland
10. Folkhälsan Research Center, Helsinki, Finland