Shear-thinning and self-healing ELP–HA hydrogel can protect cells during syringe needle flow. a) Live/dead (green/red) confocal projection images of MSCs exposed to syringe needle flow (28 gauge, 0.5 in., 4 mL min−1) within PBS or ELP–HA hydrogel. b) Quantification of cell viability immediately postinjection for multiple flow rates. Error bars represent mean ± SD. *p < 0.05, n = 5. c) Confocal 3D reconstructions of live/dead MSCs (green/red) postinjection (28 gauge, 0.5 in., 4 mL min−1) within PBS and ELP–HA hydrogel [111]. Copyright (2017) Wiley.