^a)High-resolution typing of HLA-A, HLA-B, HLA-C, and HLA-DR. For cord blood transplants, matching was done at the antigen level for HLA-A, HLA-B, and HLA-DR. ^b)Categorized as match/major mismatch/minor mismatch/major and minor mismatch. ^c)Number of transfusions prior to transplantation.

Abbreviations: AML, acute myeloid leukemia; ATG, rabbit anti-thymocyte globulin; Bu, busulfan; CB, cord blood; Cy, cyclophosphamide; Flu, fludarabine; MDS, myelodysplastic syndrome; PBSC, peripheral blood stem cells; SAA, severe aplastic anemia; WAS, Wiskott-Aldrich syndrome.