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Mitochondrial activity of NHDF on alginate and ADA-GEL hydrogels of different compositions after 4 and 7 days of cultivation. Alginate was used as the control material for each cultivation period. Asterisks denote significant difference compared with alginate films in each cultivation period, *p<0.05, **p<0.01 and ***p<0.001 (Bonferroni's post-hoc test was used).
