CD8A and neoplasm: In ALI, tumour organoids obtained from mouse tumours transplanted into syngeneic immunocompetent mice (MC38, A20, and B16‐SIY) reveal antigen‐specific clonal CD8‐positive T cells expansion and cytotoxic T cell–mediated tumour cell killing in response to anti‐PD‐1/PD‐L1 antibodies.78