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CCK-8 test value for bone marrow mesenchymal stem cells (A,D), chondrocytes (B,E), and tendon cells (C,F) in 50-, 100-, 200-, 300-, and 400-μm-pore-size scaffolds at 4, 7, 14, and 21 days. Data represent mean ± standard deviation. n = 4; *p < 0.05, compared with the 50 μm groups, #p < 0.05, compared with the 400 μm group.
