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Cell safety evaluation of sPS fibers. (A) Images captured after sPS fibers were administered for 72 h. (B) Cell viability was performed using trypan blue assay. The trypan blue exclusion assay allows for a direct identification of live (unstained) and dead (stained) cells. SA (8 mg/mL) was used as positive control. *** denotes p < 0.001 vs. Ctrl. ### denotes p < 0.001 vs. SA.
