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SEM micrographs of (a) plain PCLEEP fibres, PCLEEP64 6% electrospun at humidity of 68–72%; (b) plain PCL fibres, PCL64 10%; (c) retinoic acid-encapsulated (20 wt%) PCLEEP fibres; and (d) BSA-encapsulated (10 wt%) PCLEEP fibres; and wide-field fluorescent micrographs of (e) retinoic acid-encapsulated (10 wt%) PCLEEP fibres; and (f) FITC-BSA-encapsulated (20 wt%) PCLEEP fibres.
