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Results of safranin-O/solid green staining after 6 weeks (a, b) and 12 weeks (c, d) bone/cartilage repair. Regions with red and blue indicate the newly formed cartilage and bone, respectively. (e) Immunohistochemical staining of collagen II at the 12 weeks. Black wireframe shows the cartilage layer. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
