Fig. 6From: Epithelial differentiation of human adipose-derived stem cells (hASCs) undergoing three-dimensional (3D) cultivation with collagen sponge scaffold (CSS) via an indirect co-culture strategyLSCM images of hASCs adherence and proliferation onto the CSSs after 10 and 15 days of cultivation. a hASCs indirectly co-cultured with HaCaT cells at ALI. b hASCs indirectly co-cultured with HaCaT cells under ALI. c hASCs cultured under ALI without HaCaT’s co-cultivation. d Quantification of phalloidin positive area (%) at different intervals (*p < 0.05)Back to article page