1. From the Laboratory of Immunogenetics, Department of Genetics, Biology and Biochemistry, Research Center on Experimental Medicine (CeRMS), and the Department of Medicine and Experimental Oncology, University of Torino Medical School, Italy; Department of Hematology, University Hospital, Essen, Germany; and Bone Marrow Transplant Center, “Bianchi Melacrino Morelli” Hospital, Reggio Calabria, Italy.