[1] Univ Bologna, S Orsola M Malpighi Hosp, Dept Haematol & Oncol L & A Seragnoli, Haematopathol Sect, Bologna, Italy
[2] Univ Bologna, S Orsola M Malpighi Hosp, Dept Haematol & Oncol L & A Seragnoli, Haematol Sect, Bologna, Italy
[3] Univ Perugia, Inst Haematol, I-06100 Perugia, Italy