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MTT assay. The cell adhesion ability of different concentrations of ACVM-HLC-I was evaluated by MTT assay on days 1, 4 and 7. ACVM-HLC-I, acellular vascular matrix-human-like collagen I. *P<0.05 vs. 0.25 mg/ml, #P<0.05 vs. day 1, &P<0.05 vs. day 4.
