Hernández-Díaz, Sonia Cardioprotective aspirin users and their excess risk of upper gastrointestinal complications. [electronic resource] - BMC medicine Sep 2006 - 22 p. digital Publication Type: Journal Article ISSN: 1741-7015 Standard No.: 10.1186/1741-7015-4-22 doi Subjects--Topical Terms: AdultAgedAged, 80 and overAnti-Inflammatory Agents, Non-Steroidal--adverse effectsAspirin--adverse effectsCardiotonic Agents--adverse effectsCohort StudiesDatabases, FactualGastrointestinal Diseases--chemically inducedHumansMiddle AgedPeptic Ulcer--chemically inducedRiskRisk Assessment