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The microstructure of scaffolds observed using SEM. (A) Morphology of the random electrospun fibers with small, medium, and large diameters, varying from 0.55 μm to 3.29 μm; (B) morphology of the aligned electrospun fibers with small, medium, and large diameters, varying from 0.5 μm to 3.19 μm.
