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Expression of collagen type I (Col-1) in nasal polyp (NP) tissues. (A) The distribution of Col-1 in the samples of NP tissues as examined via immunohistochemical staining using anti-Col-1 antibody; (B) Western blot analysis of NPs. GAPDH was used as an internal control. IT, inferior turbinate tissue; NP, nasal polyp tissue; GAPDH, Glyceraldehyde 3-phosphate dehydrogenase.
