title: Commentary: peptic ulcer, Susser and Stein and the cohort phenomenon.
authors.affiliation: Department of Medicine, University of Birmingham, Queen Elizabeth Hospital, Birmingham B15 2TH, UK.
authors.forename: Michael
authors.initials: M
authors.lastname: Langman
mesh_terms: D015988:Cohort Effect; D016481:Helicobacter Infections / Q000453:epidemiology; D016480:Helicobacter pylori; D006801:Humans; D010437:Peptic Ulcer / Q000382:microbiology / Q000401:mortality*; D012307:Risk Factors; D012907:Smoking