1. Department of Hematology, Bone Marrow Transplant Center, Spirito Santo Hospital, Pescara, Italy;
2. Rome Transplant Network, Department of Hematology, Stem Cell Transplant Unit, Tor Vergata University, Rome, Italy;
3. Department of Immunohematology, Division of Blood Bank, Tor Vergata University, Rome, Italy;
4. Laboratory of Immunogenetics and Transplant Biology, IME Foundation, Policlinic of Tor Vergata, Rome, Italy;
5. Department of Molecular Medicine, Sapienza University, Rome, Italy;
6. Division of Clinical Infectious Diseases, Tor Vergata University, Rome, Italy;
7. Department of Biomedical Sciences, Laboratory of Biostatistics, University of Chieti, Chieti, Italy;
8. Tissue Typing Regional Center, San Salvatore Hospital, L'Aquila, Italy;
9. Department of Hematology, University Hospital, Ancona, Italy; and
10. Division of Hematology and Bone Marrow Transplantation, Chaim Sheba Medical Center, Tel-Hashomer, Israel