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Immunohistochemical examination of LMP1 expression. (A) H&E staining of NPC tissue. (B) LMP1 expression in NPC tissue (+). (C) LMP1 expression in NPC tissue (+++). (D) Negative control of LMP1 staining in NPC tissue. (E) Negative control of LMP1 staining in nasopharyngitis tissue. (F) Weak LMP1 expression in nasopharyngitis tissue. Magnification ×400.
