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Human bone-marrow-derived cells 14 days after isolation (a), magnification 400×; expressing vimentin (b), magnification 400×; and α-SMA (c), magnification 1000×; and human umbilical-cord blood-derived endothelial progenitor cells 21 days after isolation (d), magnification 50×; demonstrating ac-LDL uptake (e), magnification 50×; and von Willebrand factor (f), magnification 100×, for fabrication of living autologous heart valves. (Hoerstrup et al. (2002a); Schmidt et al. (2004))
