[1] Osped Policlin San Martino, Hematol & BMT Unit, Genoa, Italy
[2] Univ Torino, Dipartimento Sci Clin & Biol, Turin, Italy
[3] Osped Mauriziano Torino, Turin, Italy
[4] Univ Bordeaux, Bergonie Canc Inst, Bordeaux, France
[5] Mem Sloan Kettering Canc Ctr, Myeloproliferat Neoplasms Program, 1275 York Ave, New York, NY 10021 USA