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Effects of different fucoidans on proliferation of HeLa (a) and HepG2 cancer cells (b), proliferation (c) and NO production (d) in RAW264.7 macrophages cells (mean ± SD). The letters a, b, c, d indicate a significant difference (p < 0.05) between the concentrations of each fucoidan, and A,B,C,D indicate a significant difference (p < 0.05) between different fucoidans at a constant concentration
