SLAMF6 and neoplasm: We found that 9D9 increased the absolute numbers of tumor-infiltrating CD44+PD-1+ CD8+ T cells, stem-like/progenitor exhausted (SLAMF6+TIM3−) and effector/terminally exhausted (SLAMF6−TIM3+) CD8+ T cells (Figures S5A–S5C).