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(A) cryogenic scanning electron microscopy image of HA DXN,60 Reprint with permission from American Chemical Society; (B) Porcine articular chondrocytes in a fiber-reinforced 2% agarose gel,67 Reprint with permission from Nature Publishing Group, 2007; (C) Polarized light microscopy image of engineered annulus fibrous replicating the gross fiber orientation of the native tissue, 68 Scale bars: 200 μm, Reprint with permission from Nature Publishing Group.
