title: The national ASGE survey on upper gastrointestinal bleeding. I. Study design and baseline data.
mesh_terms: D000328:Adult; D000368:Aged; D003625:Data Collection; D004724:Endoscopy; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000453:epidemiology / Q000628:therapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies