1. Pediatric Cardiology at Department of Pediatrics; Institute of Clinical Science; The Sahlgrenska Academy at University of Gothenburg; Gothenburg
2. Department of Clinical Science, Paediatrics; Umeå University; Umeå; Sweden
3. Pediatric Cardiology; Karolinska University Hospital; Solna; Stockholm; Sweden
4. Department of Pediatrics; Skåne University Hospital/Lund; Lund
5. Department of Pediatrics; County Hospital Halmstad; Halmstad; Sweden
6. Göteborg Pediatric Growth Research Center; Department of Pediatrics; Institute of Clinical Science; The Sahlgrenska Academy at University of Gothenburg; Gothenburg; Sweden