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Sketch of suture fabrication. (a) Schematic of coaxial NFES; (b) schematic of twisting device (ten nanofibers twisted into yarn); (c) schematic of knitting machine; and (d) sutures: from fibers to suture. Optical microscopy images of (e) core–shell fibers (×70), (f) yarn (×210), and (g) suture (×70). Reproduced with permission from Ye et al., Macromol. Biosci; published by Wiley-VCH GmbH, Weinheim, 2018.
