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Quantitative polymerase chain reaction analysis of differentially expressed genes in nine patients with esophageal cancer. (A) VEGFA, (B) HBEGF, (C) PTP4A1, (D) UQCRB. *P<0.05. VEGFA, vascular endothelial growth factor A; HBEGF, heparin-binding EGF-like growth factor; PTP4A1, protein tyrosine phosphatase type IVA; UQCRB, ubiquinol-cytochrome c reductase binding.
