CD8A and hemophagocytic syndrome: Immunophenotypic analyses on the peripheral blood lymphocytes isolated from EBV-HLH patients and corresponding recipient mice revealed that cells of an identical immunophenotype (CD3+CD8+CD45RO+CD19−CD4−CD45RA−CD16−CD56−) were present and contained EBV DNA in both the patients and corresponding mice (Figure 6C and data not shown).