1. Children’s Hospital, and Pediatric Research Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
2. Department of Public Health Promotion, Finnish Institute for Health and Welfare, Helsinki, Finland
3. Department of Radiology, HUS Medical Imaging Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
4. SleepWell Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
5. Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Helsinki, Finland
6. PEDEGO Research Unit, University of Oulu, Oulu, Finland
7. Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway