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HE (a–d) and toluidine blue (e–h), as well as Col I (i–l) and Col II (m–p) immunohistochemical staining images of cell-laden PSB (left) and SBH (right) scaffolds after cultivation in vitro for 4 weeks and in vivo for another 16 weeks. The red squares represent the regions corresponding to the magnified stained images.
