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Fluorescent imaging and histopathological section of colorectum and liver. A. Fluorescent imaging in colorectum and liver. B. Histopathological section of colorectum and liver. C. Fluorescence intensity of colorectal cancer, normal colorectum, liver metastasis and normal liver. Notes: Compared with the normal liver or colorectum tissues: *P < 0.05, **P < 0.01, and ***P < 0.001.
