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Hematoxylin and eosin (H&E) histological staining for representative unprinted DermaMatrix (A) and DermaMatrix printed half with 100 μg/mL BMP-2, 12 OPs (B) and half left unprinted (C). Large black arrows denote calvarial defect perimeter. IC, invading undefined cells; WB, woven bone (magnification, × 50).
