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. 2019 May 24;9:7797. doi: 10.1038/s41598-019-44113-6

Figure 1.

Figure 1

Pre-vascularization of scaffold-free 3D skin. Schematic drawing of the general strategy for creating vascularized dermo-epidermal skin substitutes in vitro. NHDF: neonatal normal human dermal fibroblasts; HUVEC: human umbilical vein endothelial cells; HEKn: neonatal human epidermal keratinocytes; FN-G: fibronectin and gelatin; LbL: layer-by-layer.