[1] G Gaslini Childrens Hosp, Hematol Unit, G Gaslini Childrens Inst, I-16147 Genoa, Italy
[2] Univ Milan La Bicocca, Pediat Clin, Monza, Italy
[3] Meyer Childrens Hosp, Hematooncol Unit, Florence, Italy
[4] G Di Cristina Childrens Hosp, Hematooncol Unit, Palermo, Italy
[5] Univ Padua, Pediat Oncohematol Clin, Padua, Italy
[6] Univ Bari, Dept Pediat, Bari, Italy
[7] Osped Maggiore Policlin IRCCS, Dept Pediat, Milan, Italy
[8] Regina Margherita Hosp, Hematol Unit, Turin, Italy
[9] Pausillipon Hosp, Pediat Hematol Unit, Naples, Italy
[10] Univ Hosp Parma, Pediat & Oncohematol Unit, Parma, Italy