CCS and colonic neoplasm: The extreme susceptibility or resistance to lung tumors observed in the CcS strains, concordant to colon tumor susceptibility, has been supported by results from crosses of CcS-19, CcS-11, CcS-10 and CcS-20 with (BALB/c×FVB)F1 mice (tested due to the small number of available CcS mice) (Figure S1, Table S1).