CCR7 and neoplasm: The T‐cell subpopulations of scATAC‐seq also showed unequal preference in adjacent and tumor tissues; for example naïve T cells (CD8‐TCF7 and CD4‐CCR7) were found predominantly in adjacent tissues, whereas exhausted T cells (CD8‐HAVCR2) were enriched in the normal tumors (Figure S2F).