Figure 1. Soft substrates promoted aspect ratio of hFFs. (A) Phase-contrast images of hFFs on TCP and soft substrates with or without TGF-β1 at day 1. Scale bars: 200 μm (up) or 100 μm (down). (B) Aspect ratio of hFFs on TCP and soft substrates with or without TGF-β1 at day 1. ***P < 0.001 (mean, n = 10).