Perforated duodenal ulcers.
D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000009:adverse effects*; D004381:Duodenal Ulcer / Q000139:chemically induced*; D006801:Humans; D010439:Peptic Ulcer Perforation / Q000139:chemically induced*
D000894:Anti-Inflammatory Agents, Non-Steroidal