1 Department of Pediatric Cardiology, Hospital Doctor Josep Trueta, Facultad de Medicina, Universidad de Girona, Girona, Spain; Department of Pediatric Cardiology, Hospital Vall d'Hebron, Facultad de Medicina, Universidad Autònoma Barcelona, Barcelona, Spain.
2 Department of Pediatric Cardiology, Hospital Vall d'Hebron, Facultad de Medicina, Universidad Autònoma Barcelona, Barcelona, Spain.
3 Department of Pediatric Cardiology, Hospital Vall d'Hebron, Facultad de Medicina, Universidad Autònoma Barcelona, Barcelona, Spain; Department of Paediatric Cardiology, Royal Brompton and Harefield NHS Foundation Trust, London, United Kingdom.