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N-cadherin and β-catenin expression in NPC samples. (A and B) Reverse transcription-quantitative polymerase chain reaction analysis of relative expression of N-cadherin and β-catenin in 26 NPC specimens and 8 nasopharyngeal epithelial specimens. Data are normalized to glyceraldehyde 3-phosphate dehydrogenase. Differences between groups were analyzed using the t-test (N-cadherin, P<0.01; β-catenin, P<0.01). NPC, nasopharyngeal carcinoma; N, normal; T, tumor.
