1 Perinatal Epidemiology Research Unit, Department of Pediatrics and Adolescent Medicine, Aarhus University Hospital, Aarhus; Department of Pediatrics and Adolescent Medicine, Randers Regional Hospital, Randers.
2 Center for Rare Diseases, Department of Pediatrics and Adolescent Medicine, Aarhus University Hospital, Aarhus.
3 Department of Cardiothoracic and Vascular Surgery, Aarhus University Hospital, Aarhus; Department of Cardiothoracic Surgery, Rigshospitalet, Copenhagen.
4 Perinatal Epidemiology Research Unit, Department of Pediatrics and Adolescent Medicine, Aarhus University Hospital, Aarhus, Denmark.