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Figure 4: Tumor necrosis factor alpha immunoreaction of the liver among the groups. (a) No reaction in control group, (b) Widespread tumor necrosis factor alpha immunopositive cells (arrows) in the smoking group, (c) In the smoking + alpha-lipoic acid group is dense tumor necrosis factor alpha immunopositive cells (arrows) similar to smoking group, (×40)

Figure 4: Tumor necrosis factor alpha immunoreaction of the liver among the groups. (a) No reaction in control group, (b) Widespread tumor necrosis factor alpha immunopositive cells (arrows) in the smoking group, (c) In the smoking + alpha-lipoic acid group is dense tumor necrosis factor alpha immunopositive cells (arrows) similar to smoking group, (×40)