title: Occult and obscure sources of gastrointestinal bleeding.
authors.affiliation: Department of Surgery, Brigham and Women's Hospital, Boston, Massachusetts, USA.
authors.forename: S A
authors.initials: SA
authors.lastname: Chamberlain
authors.forename: D I
authors.initials: DI
authors.lastname: Soybel
mesh_terms: D000328:Adult; D000368:Aged; D000465:Algorithms; D018798:Anemia, Iron-Deficiency / Q000097:blood / Q000209:etiology; D000792:Angiography; D003113:Colonoscopy; D003663:Decision Trees; D003937:Diagnosis, Differential; D018450:Disease Progression; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000097:blood / Q000175:diagnosis* / Q000209:etiology* / Q000628:therapy; D006138:Guaiac; D006801:Humans; D007202:Indicators and Reagents; D008297:Male; D008875:Middle Aged; D009780:Occult Blood; D014057:Tomography, X-Ray Computed
chemical_list: D007202:Indicators and Reagents; D006138:Guaiac