[1] San Maurizio Reg Hosp, Dept Cardiol, I-39100 Bolzano, Italy
[2] Univ Padua, Pediat & Congenital Cardiac Surg Unit, Padua, Italy
[3] San Maurizio Reg Hosp, Dept Pneumol, I-39100 Bolzano, Italy
[4] San Maurizio Reg Hosp, Serv Radiol, I-39100 Bolzano, Italy