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ASA VI enhanced collagen deposition and remodeling. Tissue sections are stained with Masson's trichrome (blue=collagen; red=cytoplasm and muscle fibers). The ASA VI group showed well-organized and abundant collagen, whereas scattered and disorganized collagen appeared in the control group. The rectangles refer to the close-up areas. Original scale bar=100 μm and close-up scale bar=10 μm.
