Perforated peptic ulcer.
D000328:Adult; D000368:Aged; D000375:Aging; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009864:Ontario; D010439:Peptic Ulcer Perforation / Q000453:epidemiology* / Q000401:mortality*; D012621:Seasons; D012723:Sex