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SEM images of the surface morphology (a–e), the high magnification (f), surface porosity (g) and pore size (h) of MAO-WE43 and GelMA/MAO-WE43 coatings. (a): 1#, MAO-WE43; (b): 2#, 1GelMA/MAO-WE43; (c): 3#, 5GelMA/MAO-WE43; (d): 4#, 10GelMA/MAO-WE43; (e): 5#, 15GelMA/MAO-WE43.
