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Alteration of peripheral cytokines with tumor progression. The serum samples' supernatant cytokines (IFN-γ, TFN-α, IL-2, IL-4 and IL-10) levels were measured with commercially available ELISA kits. Data were expressed as averages and SD. * means compared with control group, P < 0.05. # means compared with group A, P < 0.05. $ means compared with group B, P < 0.05.
