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Chronological changes in the liver and body weights. Chronological changes in the liver and body weights of the rats in the DEN and control groups are demonstrated. After 12 and 14 weeks of the treatment, the relative liver weight (liver weight/body weight) in the DEN group was significantly higher than that in the control group. DEN, diethylnitrosamine; W, weeks. *p<0.05 (unrelated t-test).
