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Fibroblasts which were observed after cell IHC. Fibroblasts observed under ×100 light microscope after IHC, IHC indicated that intracellular expression of vimentin was positive (a), while that of the CK-19 was negative (b), highlighting that these fibroblasts were interstitially derived. (a) Anti-vimentin antibody (primary antibody); (b) anti-CK-19 antibody (primary antibody); (c) blank control (PBS). IHC: Immunohistochemistry.
