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Depth-dependent aggregate modulus (Chen et al., 2001; Schinagl et al., 1997; Wang et al., 2001) and initial permeability of the articular cartilage used in the present study. The initial permeability k0 was assumed to decrease linearly from 1×10−14 m4/Ns at the articular surface to 1×10−16 m4/Ns at the cartilage-bone interface.
