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Representative SEM images showing RAW 264.7 cells' morphology of spontaneously differentiated and LPS-stimulated macrophages. MEW scaffolds with varying fiber orientation and architecture (strand spacing), namely, random, aligned, and scaffolds of 250 μm and 500 μm strands spacing at 0°/90°-oriented junctions. The images show mixed patterns of macrophages spreading, the round shape typical for M1 and more pronounced elongated pattern typical for M2 phenotype.
