1. Cerrahpaşa Faculty of Medicine, Istanbul University-Cerrahpaşa, Istanbul, Turkey
2. Division of Hematology and Blood and Marrow Transplantation, Department of Medical Area, University of Udine, Udine, Italy
3. Division of Hematology, Department of Internal Medicine, Cerrahpaşa Faculty of Medicine, Istanbul University-Cerrahpaşa, Istanbul, Turkey