[1] Fdn IRCCS Policlin S Matteo, Dept Radiodiag, Sect Paediat Radiol, I-27100 Pavia, Italy
[2] Univ Pavia, Fdn IRCCS Policlin S Matteo, Dept Paediat Haematol Oncol, I-27100 Pavia, Italy
[3] Univ Pavia, Fdn IRCCS Policlin S Matteo, Inst Radiol, I-27100 Pavia, Italy