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Freshly outgrown CPC were characterized morphologically and by immunocytochemical stainings. A: Cartilage slice after 11 days of cultivation with emigrated cells of fibroblastoid appearence. B-F: Immunocytochemical staining of chondrogenic progenitor cells (CPC) specific for CD73 (B), CD90 (C), CD166 (D) and CD54 (E); F: negative control. The bar indicates 100 μm.
