[1] Univ Padua, Dept Cardiac Thorac Vasc Sci & Publ Hlth, Pediat & Congenital Cardiac Surg Unit, Via Giustiniani 2, I-35100 Padua, Italy
[2] Univ Padua, Dept Womens & Childrens Hlth, Pediat Cardiol Unit, Padua, Italy
[3] Univ Padua, Dept Cardiac Thorac Vasc Sci & Publ Hlth, Biostat Unit, Padua, Italy