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The effect of folic acid on the development of stomach and other gastrointestinal cancers
【作 者】
：
【机 构】
：
DepartmentofGastroenterology,TheNinthPeople'sHospital,ShanghaiSecondMedicalUniversity,Shanghai20001
【出 处】
：
中华医学杂志英文版
【发表日期】
：
2003年116期
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