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Compressive modulus of (white bars and diamonds) ND hydrogels without cells, (dark gray bars and triangles) ND constructs with encapsulated chondrocytes and (light gray bars and circles) PD constructs with encapsulated chondrocytes as a function of in vitro culture period. Averages are shown by bars, and individual measurements are also shown for each time point and condition. p < 0.05 (), p < 0.001 ().
