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机构:
Capital Med Univ, Beijing Friendship Hosp, Dept Gastroenterol, 95 Yongan Rd, Beijing 100050, Peoples R China
Natl Clin Res Ctr Digest Dis, Beijing Digest Dis Ctr, Beijing Key Lab Precancerous Lesion Digest Dis, Beijing, Peoples R China Capital Med Univ, Beijing Friendship Hosp, Dept Gastroenterol, 95 Yongan Rd, Beijing 100050, Peoples R China