食管癌高发区1.5万队列人群内镜筛查与食管癌胃癌死亡研究
식관암고발구1.5만대렬인군내경사사여식관암위암사망연구
Endoscopic Screening Cohort Study of 15,000 Subjects in High-risk Area of Esophageal Cancer and Investigation of Death Caused by Esophageal Cancer and Gastric Cancer
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