To generate B220+CD11c+NK1.1+ HepELs, which were primed by the tumour‐bearing liver microenvironment in vitro, we set up an assay system illustrated in Fig 7A. In the system, B220+CD11c+NK1.1+ HepELs from tumour‐bearing mice were seeded in the lower well, and various diced tissues were placed in the upper culture insert. Here, ITGAX is linked to neoplasm.