河南省林州市2004与1980年食管癌前病变和食管癌患病率的比较研究
하남성림주시2004여1980년식관암전병변화식관암환병솔적비교연구
Comparative studies on prevalence of precursor lesions and esophageal carcinoma in Lingzhou city, Henan Province between 1980 and 2004
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