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Gene expression in human chondrocytes embedded in PEG hydrogel with (black bars) and without (grey bars) OC plug cultured for 2, 4, and 6 weeks (normalized to 2 week expression without OC plug). (A) Collagen type II expression. (B) Aggrecan expression. (C) Collagen type I expression. Asterisks indicate statistical significance between assigned groups (*p<0.05; **p<0.01) (n=3).
