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Expression levels of APP mRNA assessed by quantitative reverse transcription-polymerase chain reaction. A: Colorectal cancer (CRC) tissues and normal intestinal mucosa tissues; B: Tissues inside and outside the serosal layer; C: Tissues with and without lymph node metastasis (LNM); D: Tissues of tumor-node-metastasis (TNM) stages. bP < 0.01 vs control.
