1. Institute of Hematology, University of Perugia, Perugia, Italy;
2. Hematology, University of Siena and Azienda Ospedaliera Universitaria Senese, Siena, Italy;
3. Department of Clinical and Experimental Medicine, Hematology and Clinical Immunology Section, University of Padua, Padua, Italy;
4. Department of Medicine, Hematology Section, University of Verona, Verona, Italy;
5. Department of Pathology, Center for Experimental Research and Medical Studies, University of Torino, Turin, Italy; and
6. Division of Hematology, Department of Cellular Biotechnologies and Hematology, Sapienza University, Rome, Italy