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In vivo tumorigenesis assay and histological evaluation. (a) In vivo tumorigenesis assay: (a) Tumor formation of nude mouse in experimental group. (b) The general view of tissue sampling in nude mouse. (c) The general view of tissue sampling in control group. (B) Histological evaluation: (a) HE staining of OSCC tumor tissues in nude mouse. (b) HE staining of normal tissues in control group. (n = 6)
