1. Institution of Health and Care Sciences; University of Gothenburg; Gothenburg Sweden
2. Department of Pediatric Cardiology; The Queen Silvia Children's Hospital; Gothenburg Sweden
3. Institution for Women's and Children's Health; Karolinska Institute; Stockholm Sweden
4. Department of Paediatric Cardiology; Astrid Lindgren Children's Hospital; Stockholm Sweden
5. Department of Pediatric Cardiology; Skåne University Hospital; Lund Sweden
6. Department of Clinical Sciences, Pediatrics; Umeå University; Umeå Sweden
7. University West; Department of Health Science; Trollhättan Sweden
8. Department of Pediatrics; The Queen Silvia Children's Hospital; Gothenburg Sweden