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In vitro effects of CD3/CD28 antibody stimulation and precision templated scaffolds derived small extracellular vesicles treatment on CD3+ splenic T cell viability measured via trypan blue cell counts after 48-h culture post-isolation. No significant difference in the total number of cells was noted (data not shown; *p < 0.05. n = 4 for treated and n = 12 for untreated)
