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Immunostimulatory activity of CS, GO, and GO-CS. RAW264.7 cells were treated with the indicated materials. The concentration of GO and GO-CS was 50 μg/mL. (a) IL-6 production; (b) TNF-α production. Data are presented as mean ± SD (n = 3). *P < 0.05, **P < 0.01.
