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The Fluorescence in situ hybridization of EGFR and ERBB-2 in MB, PNET and small cell GBM. A) The positive signals of EGFR gene amplification in MB (a), PNET (b) and small cell GBM (c); B) The signals of EGFR gene in MB (d), PNET (e) and small cell GBM (f). The bar: 25 μm.
