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CD44 in Regions I–IV. Total lung cells from saline- and bleomycin-treated mice sacrificed 28 days after initiation of treatment were immunolabeled for CD45, Pro, and CD44. CD44 levels in Regions I–IV, and I + II are shown in terms of the average ± s.e.m. of the median fluorescence intensity of each of 9 saline and 11 bleomycin mice. S, saline; B, bleomycin. *p < 0.05.
