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SEM image of nanofiber and microfiber scaffolds. (a) Nanofiber scaffolds with average diameter of 440±20 nm, average pore size of 1.2±0.2 μm2, and overall porosity of 88±3%. (b) Microfiber scaffolds with average diameter of 4.3±0.8 μm, average pore size of 90±10 μm2, and overall porosity of 90±2%. Scale bar = 10 μm.
