1. Department of Pediatrics and Adolescence, PEDEGO Research Unit, Oulu University Hospital and University of Oulu, Oulu, Finland;
2. Department of Pediatrics and Adolescence, Kuopio University Hospital, Kuopio, Finland;
3. Department of Pediatrics and Adolescence, Turku University Hospital and Turku University, Turku, Finland;
4. Department of Pediatrics and Adolescence, Tampere University Hospital, Tampere, Finland;
5. Department of Pediatrics and Adolescence, Helsinki University Hospital, Helsinki, Finland;
6. Department of Women’s and Children’s Health, Uppsala University, Uppsala, Sweden