老年胃癌活检标本与手术切除胃癌组织p53、c-erbB-2、p21、nm23基因表达检测的比较研究
노년위암활검표본여수술절제위암조직p53、c-erbB-2、p21、nm23기인표체검측적비교연구
Comparative study on detection of p53,c-erbB-2,p21 and nm23 gene expression between resected tissue specimens and biopsy specimens of gastric cancer in the elderly
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