title: Acute GI bleeding: upper and lower, but is there a "middle kingdom"?
authors.forename: Richard C K
authors.initials: RC
authors.lastname: Wong
mesh_terms: D000208:Acute Disease; D016022:Case-Control Studies; D016099:Endoscopy, Gastrointestinal; D006471:Gastrointestinal Hemorrhage / Q000145:classification / Q000175:diagnosis / Q000191:economics; D006801:Humans; D007421:Intestine, Small; D012189:Retrospective Studies