[1] P Palagi Hosp, Div Prenatal, Diag Ctr, Florence, Italy
[2] Tuscany Reg Natl Res Ctr, Fdn G Monasterio, Div Pediat Cardiac Surg, Massa, Italy
[3] Tuscany Reg Natl Res Ctr, Fdn G Monasterio, Div Pediat Cardiol, Via Aurelia Sud, I-54100 Massa, Italy