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Effects of three Lactobacillus plantarum strains on the frequency of IL-21, IL-17, IL-4, and IFN-γ-producing tetanus toxoid-stimulated memory-CD45RO+ Th cells. Data are expressed as mean ± SEM. Statistical significant differences were determined by using two-sided Student’s t-tests. A p-value <0.05 was considered statistically significant. A p-value <0.1 was considered a statistical trend.
