Perforated peptic ulcer in the Vancouver area: a survey of 852 cases.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001955:British Columbia; D002648:Child; D002675:Child, Preschool; D004381:Duodenal Ulcer / Q000453:epidemiology; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D010439:Peptic Ulcer Perforation / Q000453:epidemiology* / Q000401:mortality / Q000601:surgery / Q000628:therapy; D012621:Seasons; D012737:Sex Factors; D013276:Stomach Ulcer / Q000453:epidemiology; D013997:Time Factors