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precancer 英/ pri??k?ns?(r) / 美/ ?pr?k?ns?r / - 1
医药科学 癌前病变 There are several districts with high incidence of this disease in China. Screening of precancer and early stage cancer of esophagus is an important approach for reducing the incidence rate and death rate. 食管癌在我国呈现地域性高发的分布特点，筛查和发现癌前病变病例对于降低食管癌发病率和死亡率具有重要意义。 癌前期
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