[Epidemiology of gastric ulcer. A preliminary study].
D000293:Adolescent; D000328:Adult; D000368:Aged; D003718:Denmark; D004415:Dyspepsia / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013276:Stomach Ulcer / Q000453:epidemiology*
Mavesårssygdommens epidemiologi. En praeliminaer undersogelse.