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Immunohistochemical analysis of platelet-derived growth factor receptor-β (PDGFR-β) expression. Expression of PDGFR-β protein was evaluated by immunohistochemical analysis of resected specimens of gastric cancer. Positive staining for PDGFR-β was observed in the tumor stromal cells of gastric cancer tissue in (A) differentiated and (B) undifferentiated types of gastric cancer.
