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(A1)–(D1) Stereo view and (A2)–(D2) section view of 3D-reconstructured confocal images of ECs after being cultured for (A, C) 1 day and (B, D) 7 days atop photo-responsive hydrogels (A, B) without and (C, D) with irradiation at λ = 254 nm, respectively. Under the lower well of Boyden chamber, macrophages polarized to M1 phenotype were seeded
