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Biocompatibility of the composite hydrogel. (A) Cell proliferation after 1, 3, and 7 days incubation with composite hydrogels with different PAL contents (no PAL, 1, 2, and 4 w/v % PAL group). (B) Fluorescence micrographs of live/dead staining of cells in contact with the composite hydrogels (no PAL, 1, 2, and 4 w/v % PAL group) after 1, 3, and 7 days of incubation. (Green: live cells; Red: dead cells).
