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The concentration of IL-10 in supernatants following stimulation of splenocytes with E7 antigen. All treated groups < PBS groups *** (P < 0.001) indicates statistically significant difference between treated groups compared with control group; VTCL 15 < TCL/VTCL10 *** (P < 0.001); No significance difference between VTCL 15 and VTCL 10 group * (P > 0.05).
