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The proliferation of NIH3T3 cells on block-type PUSX nanofibers with various chain lengths, block-type PUSX nanofibers with various silicone concentrations, and graft-type PUSX nanofibers after cells were cultured for 1, 3, 5, and 7 days, respectively. “*” was statistically significant (p < 0.05) for each sample between 1 day and 3, 5, and 7 days.
