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H&E staining. Cryosections (2 μm thick) stained with hematoxylin (H) and eosin (E) to examine the burn wound healing process after application of different treatments. Samples were taken on day 7, 14 and 21. A: 100 μL of saline; B: 100 μL saline aqueous extract from wild type (WT) S. miltiorrhiza;C: 1000 ng FGF-1; and D: 100 μL saline aqueous extract from transgenic S. miltiorrhiza. Micrographs were taken at 200×.
