Cumulative incidence of grade 2-4 acute GVHD by patient mismatch HLA-DP group and T-cell epitope mismatching. Patients were divided into 4 groups according to patient mismatch HLA-DP group and HLA-DPB1 T-cell epitope mismatching. DP5–non-PM, patient mismatch HLA-DP5 group and TCE nonpermissive mismatch; DP5-PM, patient mismatch HLA-DP5-group and TCE permissive mismatch; DP2–non-PM, patient mismatch HLA-DP2-group and TCE nonpermissive mismatch; DP2-PM, patient mismatch HLA-DP2 group and TCE permissive mismatch.