CD8A and chronic myelogenous leukemia, BCR-ABL1 positive: In 1 of these 12 patients, chronic myeloid leukemia (CML) patient UPN 539, 0.04% and 0.36% ZAPHIR-tetramer+ CD8+ T cells could be detected in the in vitro-stimulated T cell cultures obtained from PBMC samples at 7 and 40 weeks post-therapeutic DLI, while no (<0.01%) tetramer+ cells could be detected directly in the PBMC (Figure 6B).