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机构:
Air Force Gen Hosp, Dept Gastroenterol, Beijing, Peoples R China
Second Mil Med Univ, Dept Gastroenterol, Changhai Hosp, Shanghai 200433, Peoples R China
Second Mil Med Univ, Digest Endoscopy Ctr, Changhai Hosp, Shanghai 200433, Peoples R China Air Force Gen Hosp, Dept Gastroenterol, Beijing, Peoples R China