CD34 and acute graft versus host disease: More recently, alloanergized T cells were used as DLI at 35–42 days after CD34-selected haploidentical HSCT; 16 patients were treated: low dose DLI (103 T cells/kg; n = 4) did not result in acute GVHD but also had little impact on T cell reconstitution, whereas higher doses (104-105 T cells/kg; n = 12) significantly accelerated T cell recovery, although five patients developed grade II–IV acute GVHD.