title: The role of endoscopy in the patient with lower gastrointestinal bleeding. Guidelines for clinical application.
mesh_terms: D003113:Colonoscopy; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis*; D006801:Humans; D008551:Melena / Q000175:diagnosis; D009780:Occult Blood; D012812:Sigmoidoscopy