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机构:
Capital Med Univ, Beijing Friendship Hosp, Natl Clin Res Ctr Digest Dis, Beijing Digest Dis Ctr,Dept Gastroenterol,Beijing, Beijing, Peoples R China
Capital Med Univ, Beijing Friendship Hosp, Natl Clin Res Ctr Digest Dis, Clin Epidemiol & EBM Unit, Beijing, Peoples R China Capital Med Univ, Beijing Friendship Hosp, Natl Clin Res Ctr Digest Dis, Beijing Digest Dis Ctr,Dept Gastroenterol,Beijing, Beijing, Peoples R China