[1] Univ Siena, Hematol Unit, Siena, Italy
[2] Univ Tor Vergata, S Eugenio Hosp, Hematol, Rome, Italy
[3] Fdn IRCCS Ca Granda Osped Maggiore, Milan, Italy
[4] Univ Firenze, Dept Clin & Expt Med, Florence, Italy
[5] Univ Firenze, Hematol, Florence, Italy
[6] AO Citta Salute Sci Torino, Hematol, Turin, Italy
[7] R Binaghi Hosp, Bone Marrow Transplant Ctr, Dept Med Sci, Hematol Unit, Cagliari, Italy