Non-Permissive HLA-DPB1 Disparity is a Significant Independent Risk Factor for Mortality after Unrelated Hematopoietic Stem Cell Transplantation Running Title: Nonpermissive HLA-DPB1 disparity in unrelated HSCT

Hematology and Bone Marrow Transplantation Unit, Department of Oncology, San Raffaele Scientific Institute, Milano, Italy; Biostatistics Unit, Department of Health Sciences (DISSAL), University of Genova, Italy; Immunogenetics Laboratory, Unit of Immunohematology and Blood Transfusion, Division of Regenerative Medicine and Stem Cell Therapy, San Raffaele Scientific Institute, Milano, Italy; San Raffaele Telethon Institute for Gene Therapy (HSR-TIGET), Division of Regenerative Medicine and Stem Cell Therapy, San Raffaele Scientific Institute, Milano, Italy; Division of Hematology, Ospedale San Martino, Genova, Italy; Italian Bone Marrow Donor Registry, Ospedale Galliera, Genova, Italy; Division of Hematology and Bone Marrow Transplantation, University of Udine, Udine, Italy; Immunogenetics Laboratory, Ospedale San Martino, Genova, Italy; Tissue Typing Laboratory, Azienda Ospedaliera S. M. Misericordia, Udine, Italy; Institute of Hematology "L. & A. Seragnoli", University of Bologna, Bologna, Italy; Department of Hematology, University of Florence, Florence, Italy.