title: Commentary: peptic ulcer and its discontents.
authors.affiliation: slevenstein@compuserve.com
authors.forename: Susan
authors.initials: S
authors.lastname: Levenstein
mesh_terms: D015988:Cohort Effect; D004381:Duodenal Ulcer / Q000453:epidemiology / Q000382:microbiology*; D016481:Helicobacter Infections / Q000453:epidemiology*; D016480:Helicobacter pylori; D006801:Humans; D012923:Social Class; D013276:Stomach Ulcer / Q000453:epidemiology* / Q000382:microbiology*; D014507:Urbanization