Photographs of lungs from two mice, each treated with vehicle (cottonseed oil) only, or a mixture of BaP plus NNK (2 μmol of each, once weekly for 8 weeks, as in Figure 1), or BaP plus NNK and a mixture of PEITC-NAC and myo-inositol in the diet, starting 24h after the 4th administration of BaP plus NNK. The mice were sacrificed 44 weeks after the beginning of the experiment, as in Figure 1.