[1] Univ Buenos Aires, Inst Invest Med A Lanari, Dept Hematol, RA-1427 Buenos Aires, DF, Argentina
[2] Univ Pavia, Policlin San Matteo, IRCCS, Dept Internal Med, I-27100 Pavia, Italy
[3] Telethon Inst Genet & Med, Naples, Italy
[4] Atenc Pediat Integral, Hematooncol, Buenos Aires, DF, Argentina