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Immunohistochemical evaluation of CXCR4 in BM of normal and PAH rats. (A,B) CXCR4-positive cells in normal rats without (A) or with (B) silibinin. (C) No significant difference was observed in these groups. (D,E) CXCR4-positive cells were observed in PAH rats both without (D) and with (E) silibinin. (F) No significant difference was observed in these groups. Each group consisted of four rats.
