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Cross-sectional images of (A) untreated, (B) Ar plasma-treated, and (C) Ar-NH3/H2 plasma-treated scaffolds obtained after in vitro culture with BAECs in the serum medium for 5 days. Cells were stained with 4′,6-diamidino-2-phenylindole (DAPI). Top and bottom scaffold surfaces are distinguished by dashed lines.
