Age trends for duodenal ulcer patients in Canadian hospitals.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002170:Canada; D002648:Child; D002675:Child, Preschool; D003133:Commission on Professional and Hospital Activities; D004381:Duodenal Ulcer / Q000453:epidemiology*; D006801:Humans; D007902:Length of Stay / Q000639:trends*; D008875:Middle Aged; D010343:Patient Admission / Q000639:trends*; D013997:Time Factors; D014481:United States