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Analysis of the GRP78 expression in NPC and chronic rhinitis tissues. (A) GRP78 expression in radioresistant NPC tissue (87.2% strongly positive, 34/39). (B) GRP78 expression in radiosensitive NPC tissue (58.5% positive, 31/53). (C) GRP78 expression in chronic rhinitis tissue (13.3%, weakly positive/negative, 4/30). Amplification ×20.
