Interestingly, the analysis of Axl expression in DEN+CCl4-treated livers of the Axlfl/fl, AxlΔhep and Axl+/+ mice revealed that Axl is expressed in stromal cells rather than in neoplastic hepatocytes, explaining the lack of a tumor phenotype by comparing Axlfl/fl and AxlΔhep mice (Figure S4K). Here, AXL is linked to neoplasm.