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Immunohistochemical examination of NPC and normal nasopharyngeal epithelium (Normal NP) specimens for LMP1, Id1 and Foxo3a expression. Intensive nuclear staining for Foxo3a was observed in normal NP epithelium with weak expression of Id1. In NPC tumour T1 which expresses high level of LMP1, strong Id1 expression and weak nuclear staining of Foxo3a was observed. In NPC tumour T3 which shows weak LMP1 expression, strong nuclear staining of Foxo3a and weak Id1 detection was observed.
