title: Ulcer perforation in the elderly and non-steroidal anti-inflammatory drugs.
mesh_terms: D000368:Aged; D000893:Anti-Inflammatory Agents / Q000009:adverse effects*; D001241:Aspirin / Q000009:adverse effects; D006801:Humans; D008875:Middle Aged; D010437:Peptic Ulcer / Q000139:chemically induced; D010439:Peptic Ulcer Perforation / Q000139:chemically induced*
chemical_list: D000893:Anti-Inflammatory Agents; D001241:Aspirin