1 PEDEGO Research Unit, Medical Research Center Oulu, Department of Children and Adolescents, Oulu University Hospital and University of Oulu, Oulu, Finland.
2 Department of Children and Adolescents, Division of Pediatric Cardiology, Oulu University Hospital, Oulu, Finland.
3 Department of Children and Adolescents, Division of Neonatal Medicine, Oulu University Hospital, Oulu, Finland.
4 Department of Children and Adolescents, Division of Allergology and Pulmonology, Oulu University Hospital, Oulu, Finland.