To further confirm the role of CD103+ T cells during lung adenocarcinoma initiation, we adoptively transferred purified CD103− T cells or CD103+ T cells into WT‐KRAS (G12D) and Med23−/−‐KRAS (G12D) mice and induced the KRAS (G12D) expression after that (Figure 6D). Here, MED23 is linked to lung adenocarcinoma.