Changes in bronchoalveolar lavage fluid (BALF) of C57BL/6 mice after irradiation. (A) Representative pictures of Diff-quick staining of cytospin preparation at 80 and 200 days after thoracic irradiation. Changes in the number of total cells (B), neutrophils (C), lymphocytes (D), and macrophages (E) in BALF from C57BL/6 mice. The data are reported as means ± SEM (n = 5 per group). *p < 0.05 vs. sham-irradiated controls. #p < 0.05 vs. irradiated groups.