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Linzhou City in northern China has a high incidence of esophageal squamous cell carcinoma (ESCC). This study retrospectively analyzed the data of 231 cases with ESCC collected from 1998 to 2012. Mutations of DNA polymerase β (polβ) gene in the ESCC samples from patients in Linzhou City were examined by amplifying polβ cDNA by RT-PCR followed by cloning and sequencing. Mutations in polβ were found...
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