PDCD1 and neoplasm: Consistently, the numbers of PD-1+ exhausted CD8+ T cells (CD8+PD-1+ T cells, Fig. 2i), stem-like CD8+ T cells (CD8+PD-1+TCF-1+ T cell, Fig. 2j) and terminally exhausted CD8+ T cells (CD8+PD-1+TCF-1- T cells, Fig. 2k) in tumor tissues were the highest in anti-PD-1-responsive mice compared with other groups.