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SEM of keratinocytes cultured on PDMS substrates. (A, B) Side views of (A) patterned and (B) flat PDMS substrates prior to collagen coating. (C) top view of patterned PDMS substrate prior to collagen coating. (D-G) Keratinocytes on (D) flat and (E, F, G) undulating PDMS substrates. (F) is higher magnification view of boxed region in (E). Scale bars: 100 μm (A, B, C, G), 50 μm (D, E).
