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Immunohistochemical images of tissues 24 weeks after implantation. For collagen type II, the expression in the chondral region of tissues repaired and of the normal tissue was positive. The images in the first row come from magnification of the blue rectangles in groups of scaffold, scaffold with cells, and normal, respectively. For collagen type I, the expression in the subchondral region of tissues repaired and of the normal tissue was positive.
