title: Lower gastrointestinal bleeding of unknown origin: tricks of the trade.
authors.affiliation: Department of Surgery, Dartmouth Hitchcock Medical Center, Lebanon, NH 03756, USA.
authors.forename: S E
authors.initials: SE
authors.lastname: Greer
authors.forename: R
authors.initials: R
authors.lastname: Gupta
mesh_terms: D000465:Algorithms; D003113:Colonoscopy; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000209:etiology; D006801:Humans; D007441:Intubation, Gastrointestinal; D011877:Radionuclide Imaging