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SEM image of murine osteoblasts attached and proliferating on BMP-7 coated chitosan microparticle as observed on day 5 – a, b) lower magnification and higher magnification at a scale of 300 μm and 50 μm, respectively, and on day 10 c, d) lower and higher magnification at a scale of 300 μm and 100 μm, respectively.
