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. 2019 Nov 28;14:394. doi: 10.1186/s13018-019-1434-0

Fig. 9.

Fig. 9

Microscopic assessment of the cartilage tissues at × 4 magnification with hematoxylin and eosin staining (bar 1000 μm): control group (a), microfracture group (b), scaffold group (c), and microsphere group (d)