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a) Entire view of the bilayered tubular scaffold composed of PGS/PCL electrospun nanofibers. b) SEM image of PGS/PCL nanofibers layer. c) SEM image of PCL layers. d) Cross section. e) SEM image of the interface between outer and inner layers. Reproduced with permission.[ 46 ] Copyright 2018, John Wiley & Sons Ltd.
