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Morphological transformation of MSC. A) MSC cultured for 14 days, vehicle control. B) MSC treated with 1 mM 8-Br-cAMP for 14 days. C) Human endometrial stromal fibroblasts (hESF) cultured for 4 days, vehicle control. D) hESF treated with 8-Br-cAMP for 4 days. Magnification ×40.
