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Impaired anti-LLC-1 tumor response in IFN-β-/- mice. IFN-β+/+ (○) and IFN-β-/- (•) mice were inoculated s.c. with 106 LLC-1 cells and monitored daily for tumor growth, as indicated. Each point is representative of the average tumor size for the group ± SEM. *, P ≤ 0.05; **, P ≤ 0.01.
