CD4⁺ and CD8⁺ T-cell responses via flow cytometry. TNF-α (A,C) and IFN-γ responses (B,D) (first column, leukemic cells alone; second column, remission sample alone; third column, leukemic and remission samples) in CD4⁺ and CD8⁺ T cells of P11, 4 months (A,B) and P8, 15 months (C,D). (E) CD8⁺ CD107⁺ responses (third column, leukemic and remission samples) in patient P11, 4 months compared with leukemic cells alone (first column) and remission sample alone (second column).