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Live/dead cell staining and SEM images of hFOB. (A to C) Live (green)/dead (red) cell staining of hFOB after 1 day cell culture (bar = 100 μm) and SEM images of hFOB after 7 days (D to F) and 14 days (G to I) cell culture on SF/CS nanofibers with different CS contents (bar = 20 μm).
