1. Pediatric and Congenital Cardiac Surgery Unit, Department of Cardiac, Thoracic and Vascular Sciences University of Padua Padua Italy
2. Department of Statistical Sciences University of Padua Padua Italy
3. Department of Cardiothoracic Surgery Shanghai Children's Medical Center Shanghai Jiaotong University School of Medicine Shanghai China
4. Department of Surgery, Division of Cardiac Surgery and Pediatric Heart Center Medical University Vienna Vienna Austria
5. Division for Congenital and Pediatric Heart Surgery University Hospital of Munich (LUM) Munich Germany
6. Department of Pediatric and Congenital Cardiac Surgery, Athens Heart Surgery Institute IASO Children's Hospital Athens Greece
7. Departments of Congenital Cardiothoracic Surgery Thoraxcentrum University Medical Center Groningen Groningen Netherlands
8. Department for Pediatric Cardiothoracic Surgery The Children's Memorial Health Institute Warsaw Poland
9. Department of Surgery Columbia University Medical Center New York New York USA
10. Biostatistic Unit University of Padua Padua Italy
11. Department of Children and Woman's Health, Pediatric Cardiology Unit University of Padua Padua Italy