1. Section of Pediatric and Congenital Cardiovascular Surgery; Department of Cardiac, Thoracic and Vascular Sciences; University of Padova Medical Italy; Padova Italy
2. Section of Cardiology; Department of Cardiac, Thoracic and Vascular Sciences; University of Padua; Padua Italy
3. Unit of Cardiac Surgery; Department of Cardiology and Cardiac Surgery; Bambino Gesù Children's Hospital, IRCCS; Rome Italy
4. Division of Pediatric Cardiac Surgery; Ospedale Infantile Regina Margherita; Turin Italy
5. Department of Statistics; University of Padova; Padova Italy