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. 2018 May 9;22:12. doi: 10.1186/s40824-018-0121-2

Fig. 5.

Fig. 5

Histological analysis of subcutaneously implanted collagen spheroids at 4 weeks. a Safranin-O staining and b von Kossa staining. The boxed area appears in higher magnification. Scale bar is 500 and 200 μm, respectively