1 Division of Paediatric Cardiology, Department of Women's and Children's Health, University Hospital Padua, Padua, Italy; Pediatric Research Institute (IRP) "Città della Speranza", Padua, Italy. Electronic address: jolanda.sabatino@unipd.it.
2 Division of Paediatric Cardiology, Department of Women's and Children's Health, University Hospital Padua, Padua, Italy; Pediatric Research Institute (IRP) "Città della Speranza", Padua, Italy.