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SEM images of the meshes printed with two needles of the formulations, scale bar = 1 mm (A) G, (B) GB0.5, (C) GB1, (D) GB2, (E) GS0.5, (F) GS1, and (G) GS2, where 1 refers to meshes printed with 25 G, and 2 refers to those printed with 27 G needles.
