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(a) Schematic diagram of the sequential spray coatings for fabricating an asymmetric surface coating with PEI and PLGA/PEI layers on the WE 43 stent, (b) schematic images of asymmetrically coated WE 43 samples with and without SRL loading used for in vitro cellular experiments, (c) representative CLSM micrographs of (c-1, 2) HUVECs and (c-3, 4) SMCs adhered on the PEI- and PLGA/PEI-coated WE 43 stent, and the proliferation of (d) HUVECs and (e) SMCs on all samples [159].
