[1] Univ Milan, Fdn Osped Maggiore Policlin, IRCCS, UO Hematol I BOne Marrow Transplantat Unit, Milan, Italy
[2] Univ Milan, Fdn Osped Maggiore Policlin, Dept Occupat & Environm Hlth Clin Lavoro Luigi D, EPOCA Epidemiol Res Ctr, Milan, Italy
[3] Univ Milan, IRCCS, Ist Nazl Cura Tumuri, Dept Hematol,Div Hematol & Bone Marrow Transplant, Milan, Italy