目的：探讨叶酸治疗对胃癌癌前状态细胞内叶酸水平的影响。
Objective To study the effects of the treatment with folic acid on intracellular folic acid levels of precancerous condition of gastric cancer.
TSA中临床病理和分子特征方面的异质性与癌前病变的状态或类型相关。
The heterogeneity of TSAs in terms of clinicopathologic and molecular features correlated with the status or type of precursor lesions.
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