[1] Mayo Clin, Div Hematol, Rochester, MN 55905 USA
[2] Citta Salute & Sci Hosp & Univ, Div Hematol, Turin, Italy
[3] British Columbia Canc, Ctr Lymphoid Canc, Vancouver, BC, Canada
[4] Natl Canc Inst, Div Med Oncol A, Aviano, Italy
[5] Celgene Corp, Summit, NJ USA