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Tumor growth of different mice groups, in immunization by the mE6/mE7 construct. A PBS, B pcDNA3, C mE6/E7 inserted pcDNA3, D mE6/E7 recombinant protein, E mE6/E7 inserted pcDNA3 + mE6/E7 recombinant protein. *P value < 0.05, **P value < 0.01, ***P value < 0.001
