[1] Fdn IRCCS Ist Nazl Tumori, Pediat Oncol Unit, Milan, Italy
[2] Meyer Childrens Univ Hosp, Dept Pediat Oncol, Neuro Oncol Unit, Viale Gaetano Pieraccini 24, I-50139 Florence, Italy
[3] V Buzzi Childrens Hosp, Dept Pediat Radiol, Milan, Italy
[4] Univ Milan, Childrens Hosp V Buzzi, Pediat Surg, Milan, Italy
[5] Fdn IRCCS Ist Nazl Tumori, Soft Tissue & Bone Pathol, Histopathol & Pediat Pathol Unit, Milan, Italy