All collected tissues were sectioned and stained with hematoxylin and eosin for histological evaluation. For IHC staining to detect specific antigens, the following antibodies were used: anti-Ki67 (Neomarkers), anti–cleaved caspase-3 (clone 5A1E, Cell Signaling), anti-CD8 (BD Biosciences), anti-NK1.1 (PK136, eBioscience), anti-SV40Tag (Santa Cruz), anti–arginase I (Santa Cruz), and anti-p63 (Neomarkers). The IHC staining protocol has been previously described (39 (link), 42 (link)). All sections were counterstained with hematoxylin for nucleus visualization.