1. Section of Hematology, Department of Critical Care, University of Florence, Florence, Italy
2. Section of Hematology, S. Donato Hospital, Arezzo, Italy
3. Medical Oncology ASL 3, Pistoia, Italy
4. Hematology Institute, University of Bari, Bari, Italy
5. Department of Clinical and Biological Sciences, University of Turin, Orbassano, Italy