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MTT assay for proliferation of MG63 cells cultured on PA laminae and nHA/PA composite-coated samples for 1, 3, 5 and 7 day(s), compared with the blank control (tissue culture plastic) under the same culture conditions. Significantly different at *p < 0.05, **p < 0.01 and ***p < 0.001. (Online version in colour.)
