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Confocal images of EC and OB co-cultures on HA surfaces showing self-assembled microcapillary-like structures on (a) large concavities, (b) large deep concavities, (c) large convexities, (d) small concavities, (e) small deep concavities, (f) small convexities and (g) flat surfaces as indicated by the red profiles. Obtained from Ref. [175]. Copyright ©2019, Gariboldi et al.
