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Quantitative assessment of (A, B) the percentage of proliferating cells, or (C, D) the number of apoptotic cells per high-power field in tumors from mice recovering from lung injury or control. (A) P = 0.04, (B) P = 0.05, (C) P = 0.02, and (D) P = 0.03. Each bar represents the analysis of tumors from the lungs of at least five mice per group. Bleo = bleomycin; naphth = naphthalene.
