1. Department of Clinical and Experimental Medicine, General Pathology and Immunology Section, University of Perugia, Perugia, Italy;
2. Department of Internal Medicine and Public Health, Chair of Hematology, University of L'Aquila, L'Aquila, Italy;
3. Department of Clinical and Experimental Medicine, Hematology and Clinical Immunology Section, University of Perugia, Perugia, Italy; and
4. Department of Experimental Medicine, University La Sapienza, Rome, Italy