1 Department of Medical, Surgical and Experimental Sciences, University of Sassari, Viale San Pietro 12, 07100 Sassari, Italy.
2 Hematology & Bone Marrow Transplant Unit, San Francesco Hospital, ASSL, Nuoro, Italy.
3 Hematology Unit, Department of Medical Sciences, University of Cagliari, Cagliari, Italy.
4 Department of Medical, Surgical and Experimental Sciences, University of Sassari, Viale San Pietro 12, 07100 Sassari, Italy. Electronic address: cfozza@uniss.it.