MSH2 and neoplasm: The numbers of tumours per tumour-bearing mouse were statistically significantly greater in both ethanol-treated induced conditional Aldh1b1flox/flox Msh2-LS and ethanol-treated induced constitutive Aldh1b1−/− Msh2-LS mice compared with those in ethanol-treated induced Aldh1b1wt Msh2-LS mice.