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Survival curve of tumor-bearing mice. a: saline control group; b: recombinant Bifidobacterium infantis containing pTRKH2-PsT plasmid group; c: recombinant Bifidobacterium infantis containing pTRKH2-PsT/sKDR plasmid group. *P < 0.05 vs. group a; ▲P < 0.05 vs. group b.
