GI bleeding: special needs of the elderly.
D000208:Acute Disease; D000368:Aged; D003110:Colonic Neoplasms / Q000150:complications / Q000175:diagnosis; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000209:etiology / Q000628:therapy; D006801:Humans; D009780:Occult Blood; D012004:Rectal Neoplasms / Q000150:complications / Q000175:diagnosis