Fig. 1

Effect of cimetidine on the DNA content of bone marrow cells in irradiated rats. 1. Normal control group; 2. Radiation model group; 3. 20 mg/(kg · d) cimetidine group; 4. 80 mg/(kg · d) cimetidine group; 5. 160 mg/(kg · d) cimetidine group. (1) P < 0.01 compared with the normal control group; (2) P < 0.01, (3) P < 0.05 compared with the radiation model group