title: Letter: the burden of co-morbidity in the population contributes more to upper gastrointestinal bleeding than aspirin.
authors: C J
authors: CJ
authors: Crooks
authors: J
authors: J
authors: West
authors: T R
authors: TR
authors: Card
mesh_terms: D000465:Algorithms; D001241:Aspirin / Q000009:adverse effects*; D002318:Cardiovascular Diseases / Q000139:chemically induced*; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000139:chemically induced*; D006801:Humans; D008297:Male; D010975:Platelet Aggregation Inhibitors / Q000009:adverse effects*
chemical_list: D010975:Platelet Aggregation Inhibitors; D001241:Aspirin