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Micrographs showing immunohistochemical stainings for collagen 1 (brown colour) in a) experimentally generated tissue, b) normal cancellous bone (positive control), c) cartilage (stained negative control) and d) experimentally generated tissue without antibody staining (not stained negative control). Similar positive staining is evident in the generated tissue and in normal bone sample. Negative controls show no staining to collagen 1.
