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Immunohistochemistry for CD68 on lung sections. The photos were obtained from an optical microscope (a) (200×), and quantification of CD68 positive cells was performed by ImageJ (b). The influence of Puer-V on IL-6 (c) in lung tissues of the rats with PAH. The results are presented as the mean ± SEM, ##P < 0.01, ###P < 0.001 vs. the control group, *P < 0.05, ***P < 0.001 vs. the model group, n = 6.
