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Analysis of optical density (OD) value of α-SMA in pulmonary arteries. (a) Immunohistochemical staining of α-SMA of pulmonary arteries (scale bar = 50 μm). (b) Quantitative analysis of OD value of α-SMA immunoreactivity in pulmonary arteries. Values are means ± SEM (n = 5). # p < 0.05, compared with saline group; $ p < 0.05, compared with MCT group.
