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机构:
Lanzhou Univ, Hosp 2, Dept Gastroenterol, Lanzhou 730030, Peoples R China
Lanzhou Univ, Clin Med Sch, Lanzhou 730030, Peoples R China
Lanzhou Univ, Hosp 2, Key Lab Digest Dis, Lanzhou 730030, Peoples R China Lanzhou Univ, Hosp 2, Dept Gastroenterol, Lanzhou 730030, Peoples R China