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BackgroundWe investigated whether genetic polymorphisms of the DNA repair gene NBN are associated with head and neck cancer risk.
MethodsWe analyzed 6 polymorphisms in 175 patients with a single laryngeal tumor, 104 with multiple primary tumors but 1 malignancy (primary/second) localized in the larynx, 60 patients with multiple primary tumors localized in the head or neck, and 275 controls.
ResultsAlthough...
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