1. Section of HematologyDepartment of Clinical and Experimental Medicine, University of Verona, Verona, Italy
2. Immuno-Hematology and Transfusional ServiceAzienda Ospedaliera of Verona, Verona, Italy
3. Section of ImmunologyDepartment of Pathology, University of Verona, Verona, Italy
4. Department of Clinical and Experimental MedicineHematology-Immunology Division, University of Padova, Padova, Italy